56656973 has 2 divisors, whose sum is σ = 56656974. Its totient is φ = 56656972.

The previous prime is 56656927. The next prime is 56656987. The reversal of 56656973 is 37965665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45454564 + 11202409 = 6742^2 + 3347^2 .

It is a cyclic number.

It is not a de Polignac number, because 56656973 - 2⁶ = 56656909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56656273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28328486 + 28328487.

It is an arithmetic number, because the mean of its divisors is an integer number (28328487).

Almost surely, 2^56656973 is an apocalyptic number.

It is an amenable number.

56656973 is a deficient number, since it is larger than the sum of its proper divisors (1).

56656973 is an equidigital number, since it uses as much as digits as its factorization.

56656973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1020600, while the sum is 47.

The square root of 56656973 is about 7527.0826353907. The cubic root of 56656973 is about 384.0765476919.

The spelling of 56656973 in words is "fifty-six million, six hundred fifty-six thousand, nine hundred seventy-three".