56857637 has 2 divisors, whose sum is σ = 56857638. Its totient is φ = 56857636.

The previous prime is 56857621. The next prime is 56857649. The reversal of 56857637 is 73675865.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36372961 + 20484676 = 6031^2 + 4526^2 .

It is a cyclic number.

It is not a de Polignac number, because 56857637 - 2⁴ = 56857621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56857591 and 56857600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56857657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28428818 + 28428819.

It is an arithmetic number, because the mean of its divisors is an integer number (28428819).

Almost surely, 2^56857637 is an apocalyptic number.

It is an amenable number.

56857637 is a deficient number, since it is larger than the sum of its proper divisors (1).

56857637 is an equidigital number, since it uses as much as digits as its factorization.

56857637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 47.

The square root of 56857637 is about 7540.4003209379. The cubic root of 56857637 is about 384.5294459162.

The spelling of 56857637 in words is "fifty-six million, eight hundred fifty-seven thousand, six hundred thirty-seven".