56955809 has 2 divisors, whose sum is σ = 56955810. Its totient is φ = 56955808.

The previous prime is 56955791. The next prime is 56955823. The reversal of 56955809 is 90855965.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38440000 + 18515809 = 6200^2 + 4303^2 .

It is a cyclic number.

It is not a de Polignac number, because 56955809 - 2⁸ = 56955553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56955859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28477904 + 28477905.

It is an arithmetic number, because the mean of its divisors is an integer number (28477905).

Almost surely, 2^56955809 is an apocalyptic number.

It is an amenable number.

56955809 is a deficient number, since it is larger than the sum of its proper divisors (1).

56955809 is an equidigital number, since it uses as much as digits as its factorization.

56955809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486000, while the sum is 47.

The square root of 56955809 is about 7546.9072473431. The cubic root of 56955809 is about 384.7506317927.

The spelling of 56955809 in words is "fifty-six million, nine hundred fifty-five thousand, eight hundred nine".