56239999 has 2 divisors, whose sum is σ = 56240000. Its totient is φ = 56239998.

The previous prime is 56239979. The next prime is 56240017. The reversal of 56239999 is 99993265.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56239999 - 2¹⁵ = 56207231 is a prime.

56239999 is a modest number, since divided by 9999 gives 5623 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56239969) 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, 28119999 + 28120000.

It is an arithmetic number, because the mean of its divisors is an integer number (28120000).

Almost surely, 2^56239999 is an apocalyptic number.

56239999 is a deficient number, since it is larger than the sum of its proper divisors (1).

56239999 is an equidigital number, since it uses as much as digits as its factorization.

56239999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1180980, while the sum is 52.

The square root of 56239999 is about 7499.3332370285. Note that the first 3 decimals coincide. The cubic root of 56239999 is about 383.1320071157.

It can be divided in two parts, 5 and 6239999, that added together give a square (6240004 = 2498²).

The spelling of 56239999 in words is "fifty-six million, two hundred thirty-nine thousand, nine hundred ninety-nine".