56808539 has 2 divisors, whose sum is σ = 56808540. Its totient is φ = 56808538.

The previous prime is 56808503. The next prime is 56808559. The reversal of 56808539 is 93580865.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56808539 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56808539.

It is not a weakly prime, because it can be changed into another prime (56808559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28404269 + 28404270.

It is an arithmetic number, because the mean of its divisors is an integer number (28404270).

Almost surely, 2^56808539 is an apocalyptic number.

56808539 is a deficient number, since it is larger than the sum of its proper divisors (1).

56808539 is an equidigital number, since it uses as much as digits as its factorization.

56808539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 56808539 is about 7537.1439551066. The cubic root of 56808539 is about 384.4187304246.

The spelling of 56808539 in words is "fifty-six million, eight hundred eight thousand, five hundred thirty-nine".