56931439 has 4 divisors (see below), whose sum is σ = 56954224. Its totient is φ = 56908656.

The previous prime is 56931403. The next prime is 56931451. The reversal of 56931439 is 93413965.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56931439 - 2⁷ = 56931311 is a prime.

It is a super-2 number, since 2×56931439² = 6482377493221442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56934439) 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, 7107 + ... + 12820.

It is an arithmetic number, because the mean of its divisors is an integer number (14238556).

Almost surely, 2^56931439 is an apocalyptic number.

56931439 is a deficient number, since it is larger than the sum of its proper divisors (22785).

56931439 is a wasteful number, since it uses less digits than its factorization.

56931439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22784.

The product of its digits is 87480, while the sum is 40.

The square root of 56931439 is about 7545.2925059271. The cubic root of 56931439 is about 384.6957488306.

The spelling of 56931439 in words is "fifty-six million, nine hundred thirty-one thousand, four hundred thirty-nine".