56957993 has 2 divisors, whose sum is σ = 56957994. Its totient is φ = 56957992.

The previous prime is 56957983. The next prime is 56958023. The reversal of 56957993 is 39975965.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56957209 + 784 = 7547^2 + 28^2 .

It is a cyclic number.

It is not a de Polignac number, because 56957993 - 2⁴ = 56957977 is a prime.

It is not a weakly prime, because it can be changed into another prime (56957903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28478996 + 28478997.

It is an arithmetic number, because the mean of its divisors is an integer number (28478997).

Almost surely, 2^56957993 is an apocalyptic number.

It is an amenable number.

56957993 is a deficient number, since it is larger than the sum of its proper divisors (1).

56957993 is an equidigital number, since it uses as much as digits as its factorization.

56957993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2296350, while the sum is 53.

The square root of 56957993 is about 7547.0519409899. The cubic root of 56957993 is about 384.7555495506.

The spelling of 56957993 in words is "fifty-six million, nine hundred fifty-seven thousand, nine hundred ninety-three".