56639069 has 2 divisors, whose sum is σ = 56639070. Its totient is φ = 56639068.

The previous prime is 56639047. The next prime is 56639111. The reversal of 56639069 is 96093665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43059844 + 13579225 = 6562^2 + 3685^2 .

It is a cyclic number.

It is not a de Polignac number, because 56639069 - 2¹⁶ = 56573533 is a prime.

It is a super-2 number, since 2×56639069² = 6415968274373522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56639039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28319534 + 28319535.

It is an arithmetic number, because the mean of its divisors is an integer number (28319535).

Almost surely, 2^56639069 is an apocalyptic number.

It is an amenable number.

56639069 is a deficient number, since it is larger than the sum of its proper divisors (1).

56639069 is an equidigital number, since it uses as much as digits as its factorization.

56639069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 44.

The square root of 56639069 is about 7525.8932360219. The cubic root of 56639069 is about 384.0360864705.

The spelling of 56639069 in words is "fifty-six million, six hundred thirty-nine thousand, sixty-nine".