56999923 has 2 divisors, whose sum is σ = 56999924. Its totient is φ = 56999922.

The previous prime is 56999893. The next prime is 56999947. The reversal of 56999923 is 32999965.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56999923 - 2²⁵ = 23445491 is a prime.

It is not a weakly prime, because it can be changed into another prime (56999323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28499961 + 28499962.

It is an arithmetic number, because the mean of its divisors is an integer number (28499962).

Almost surely, 2^56999923 is an apocalyptic number.

56999923 is a deficient number, since it is larger than the sum of its proper divisors (1).

56999923 is an equidigital number, since it uses as much as digits as its factorization.

56999923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1180980, while the sum is 52.

The square root of 56999923 is about 7549.8293358195. The cubic root of 56999923 is about 384.8499398325.

The spelling of 56999923 in words is "fifty-six million, nine hundred ninety-nine thousand, nine hundred twenty-three".