56438957 has 2 divisors, whose sum is σ = 56438958. Its totient is φ = 56438956.

The previous prime is 56438933. The next prime is 56438971. The reversal of 56438957 is 75983465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54848836 + 1590121 = 7406^2 + 1261^2 .

It is a cyclic number.

It is not a de Polignac number, because 56438957 - 2²⁰ = 55390381 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56437957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28219478 + 28219479.

It is an arithmetic number, because the mean of its divisors is an integer number (28219479).

Almost surely, 2^56438957 is an apocalyptic number.

It is an amenable number.

56438957 is a deficient number, since it is larger than the sum of its proper divisors (1).

56438957 is an equidigital number, since it uses as much as digits as its factorization.

56438957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 47.

The square root of 56438957 is about 7512.5865718806. The cubic root of 56438957 is about 383.5832723294.

The spelling of 56438957 in words is "fifty-six million, four hundred thirty-eight thousand, nine hundred fifty-seven".