71506873 has 4 divisors (see below), whose sum is σ = 71771008. Its totient is φ = 71242740.

The previous prime is 71506871. The next prime is 71506891. The reversal of 71506873 is 37860517.

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.

It is a cyclic number.

It is not a de Polignac number, because 71506873 - 2¹ = 71506871 is a prime.

It is a super-2 number, since 2×71506873² = 10226465772476258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71506871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131661 + ... + 132202.

It is an arithmetic number, because the mean of its divisors is an integer number (17942752).

Almost surely, 2^71506873 is an apocalyptic number.

It is an amenable number.

71506873 is a deficient number, since it is larger than the sum of its proper divisors (264135).

71506873 is a wasteful number, since it uses less digits than its factorization.

71506873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264134.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 71506873 is about 8456.1736618875. The cubic root of 71506873 is about 415.0648236669.

It can be divided in two parts, 71 and 506873, that added together give a square (506944 = 712²).

The spelling of 71506873 in words is "seventy-one million, five hundred six thousand, eight hundred seventy-three".