56431939 has 2 divisors, whose sum is σ = 56431940. Its totient is φ = 56431938.

The previous prime is 56431937. The next prime is 56431943. The reversal of 56431939 is 93913465.

56431939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56431939 - 2¹ = 56431937 is a prime.

It is a super-3 number, since 3×56431939³ (a number of 24 digits) contains 333 as substring.

Together with 56431937, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (56431931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28215969 + 28215970.

It is an arithmetic number, because the mean of its divisors is an integer number (28215970).

Almost surely, 2^56431939 is an apocalyptic number.

56431939 is a deficient number, since it is larger than the sum of its proper divisors (1).

56431939 is an equidigital number, since it uses as much as digits as its factorization.

56431939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 40.

The square root of 56431939 is about 7512.1194745558. The cubic root of 56431939 is about 383.5673725612.

The spelling of 56431939 in words is "fifty-six million, four hundred thirty-one thousand, nine hundred thirty-nine".