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12974189 = 103125963
BaseRepresentation
bin110001011111…
…100001101101
3220102011020112
4301133201231
511310133224
61142025405
7215164424
oct61374155
926364215
1012974189
117361778
124418265
1328c3547
141a1a2bb
15121430e
hexc5f86d

12974189 has 4 divisors (see below), whose sum is σ = 13100256. Its totient is φ = 12848124.

The previous prime is 12974177. The next prime is 12974233. The reversal of 12974189 is 98147921.

12974189 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98147921 = 929105649.

It is a cyclic number.

It is not a de Polignac number, because 12974189 - 24 = 12974173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12974119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62879 + ... + 63084.

It is an arithmetic number, because the mean of its divisors is an integer number (3275064).

Almost surely, 212974189 is an apocalyptic number.

It is an amenable number.

12974189 is a deficient number, since it is larger than the sum of its proper divisors (126067).

12974189 is a wasteful number, since it uses less digits than its factorization.

12974189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126066.

The product of its digits is 36288, while the sum is 41.

The square root of 12974189 is about 3601.9701553455. The cubic root of 12974189 is about 234.9777495155.

The spelling of 12974189 in words is "twelve million, nine hundred seventy-four thousand, one hundred eighty-nine".

Divisors: 1 103 125963 12974189