56376809 has 2 divisors, whose sum is σ = 56376810. Its totient is φ = 56376808.

The previous prime is 56376787. The next prime is 56376821. The reversal of 56376809 is 90867365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55950400 + 426409 = 7480^2 + 653^2 .

It is a cyclic number.

It is not a de Polignac number, because 56376809 - 2¹⁶ = 56311273 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 56376809.

It is not a weakly prime, because it can be changed into another prime (56376839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28188404 + 28188405.

It is an arithmetic number, because the mean of its divisors is an integer number (28188405).

Almost surely, 2^56376809 is an apocalyptic number.

It is an amenable number.

56376809 is a deficient number, since it is larger than the sum of its proper divisors (1).

56376809 is an equidigital number, since it uses as much as digits as its factorization.

56376809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 56376809 is about 7508.4491740971. The cubic root of 56376809 is about 383.4424258293.

The spelling of 56376809 in words is "fifty-six million, three hundred seventy-six thousand, eight hundred nine".