56720711 has 2 divisors, whose sum is σ = 56720712. Its totient is φ = 56720710.

The previous prime is 56720707. The next prime is 56720743. The reversal of 56720711 is 11702765.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56720711 - 2² = 56720707 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56720701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28360355 + 28360356.

It is an arithmetic number, because the mean of its divisors is an integer number (28360356).

Almost surely, 2^56720711 is an apocalyptic number.

56720711 is a deficient number, since it is larger than the sum of its proper divisors (1).

56720711 is an equidigital number, since it uses as much as digits as its factorization.

56720711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 56720711 is about 7531.3153565629. The cubic root of 56720711 is about 384.2205199486.

The spelling of 56720711 in words is "fifty-six million, seven hundred twenty thousand, seven hundred eleven".