56720239 has 2 divisors, whose sum is σ = 56720240. Its totient is φ = 56720238.

The previous prime is 56720207. The next prime is 56720243. The reversal of 56720239 is 93202765.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56720239 - 2⁵ = 56720207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56720269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28360119 + 28360120.

It is an arithmetic number, because the mean of its divisors is an integer number (28360120).

Almost surely, 2^56720239 is an apocalyptic number.

56720239 is a deficient number, since it is larger than the sum of its proper divisors (1).

56720239 is an equidigital number, since it uses as much as digits as its factorization.

56720239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 56720239 is about 7531.2840206700. The cubic root of 56720239 is about 384.2194541851.

The spelling of 56720239 in words is "fifty-six million, seven hundred twenty thousand, two hundred thirty-nine".