56940731 has 2 divisors, whose sum is σ = 56940732. Its totient is φ = 56940730.

The previous prime is 56940727. The next prime is 56940733. The reversal of 56940731 is 13704965.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56940731 - 2² = 56940727 is a prime.

It is a super-2 number, since 2×56940731² = 6484493693628722, which contains 22 as substring.

Together with 56940733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 56940691 and 56940700.

It is not a weakly prime, because it can be changed into another prime (56940733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28470365 + 28470366.

It is an arithmetic number, because the mean of its divisors is an integer number (28470366).

Almost surely, 2^56940731 is an apocalyptic number.

56940731 is a deficient number, since it is larger than the sum of its proper divisors (1).

56940731 is an equidigital number, since it uses as much as digits as its factorization.

56940731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 56940731 is about 7545.9082289675. The cubic root of 56940731 is about 384.7166769182.

The spelling of 56940731 in words is "fifty-six million, nine hundred forty thousand, seven hundred thirty-one".