56639707 has 2 divisors, whose sum is σ = 56639708. Its totient is φ = 56639706.

The previous prime is 56639663. The next prime is 56639743. The reversal of 56639707 is 70793665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56639707 - 2¹⁵ = 56606939 is a prime.

It is not a weakly prime, because it can be changed into another prime (56639797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28319853 + 28319854.

It is an arithmetic number, because the mean of its divisors is an integer number (28319854).

Almost surely, 2^56639707 is an apocalyptic number.

56639707 is a deficient number, since it is larger than the sum of its proper divisors (1).

56639707 is an equidigital number, since it uses as much as digits as its factorization.

56639707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238140, while the sum is 43.

The square root of 56639707 is about 7525.9356228977. The cubic root of 56639707 is about 384.0375284322.

The spelling of 56639707 in words is "fifty-six million, six hundred thirty-nine thousand, seven hundred seven".