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689053 = 5313001
BaseRepresentation
bin10101000001110011101
31022000012111
42220032131
5134022203
622434021
75566621
oct2501635
91260174
10689053
11430772
12292911
131b1831
1413d181
15d926d
hexa839d

689053 has 4 divisors (see below), whose sum is σ = 702108. Its totient is φ = 676000.

The previous prime is 689041. The next prime is 689063. The reversal of 689053 is 350986.

689053 is digitally balanced in base 2, 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 an emirpimes, since its reverse is a distinct semiprime: 350986 = 2175493.

It can be written as a sum of positive squares in 2 ways, for example, as 196249 + 492804 = 443^2 + 702^2 .

It is a cyclic number.

It is not a de Polignac number, because 689053 - 25 = 689021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689033) 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, 6448 + ... + 6553.

It is an arithmetic number, because the mean of its divisors is an integer number (175527).

2689053 is an apocalyptic number.

It is an amenable number.

689053 is a deficient number, since it is larger than the sum of its proper divisors (13055).

689053 is a wasteful number, since it uses less digits than its factorization.

689053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13054.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 689053 is about 830.0921635578. The cubic root of 689053 is about 88.3251145393.

The spelling of 689053 in words is "six hundred eighty-nine thousand, fifty-three".

Divisors: 1 53 13001 689053