56872639 has 2 divisors, whose sum is σ = 56872640. Its totient is φ = 56872638.

The previous prime is 56872609. The next prime is 56872649. The reversal of 56872639 is 93627865.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56872639 - 2⁷ = 56872511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56872609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28436319 + 28436320.

It is an arithmetic number, because the mean of its divisors is an integer number (28436320).

Almost surely, 2^56872639 is an apocalyptic number.

56872639 is a deficient number, since it is larger than the sum of its proper divisors (1).

56872639 is an equidigital number, since it uses as much as digits as its factorization.

56872639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 56872639 is about 7541.3950300989. The cubic root of 56872639 is about 384.5632625605.

The spelling of 56872639 in words is "fifty-six million, eight hundred seventy-two thousand, six hundred thirty-nine".