56705939 has 2 divisors, whose sum is σ = 56705940. Its totient is φ = 56705938.

The previous prime is 56705921. The next prime is 56705951. The reversal of 56705939 is 93950765.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56705939 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56705939.

It is not a weakly prime, because it can be changed into another prime (56705959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28352969 + 28352970.

It is an arithmetic number, because the mean of its divisors is an integer number (28352970).

Almost surely, 2^56705939 is an apocalyptic number.

56705939 is a deficient number, since it is larger than the sum of its proper divisors (1).

56705939 is an equidigital number, since it uses as much as digits as its factorization.

56705939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 255150, while the sum is 44.

The square root of 56705939 is about 7530.3345875200. The cubic root of 56705939 is about 384.1871623607.

The spelling of 56705939 in words is "fifty-six million, seven hundred five thousand, nine hundred thirty-nine".