56928559 has 2 divisors, whose sum is σ = 56928560. Its totient is φ = 56928558.

The previous prime is 56928511. The next prime is 56928577. The reversal of 56928559 is 95582965.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56928559 - 2¹¹ = 56926511 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56928589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28464279 + 28464280.

It is an arithmetic number, because the mean of its divisors is an integer number (28464280).

Almost surely, 2^56928559 is an apocalyptic number.

56928559 is a deficient number, since it is larger than the sum of its proper divisors (1).

56928559 is an equidigital number, since it uses as much as digits as its factorization.

56928559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972000, while the sum is 49.

The square root of 56928559 is about 7545.1016560415. The cubic root of 56928559 is about 384.6892618323.

The spelling of 56928559 in words is "fifty-six million, nine hundred twenty-eight thousand, five hundred fifty-nine".