56863309 has 2 divisors, whose sum is σ = 56863310. Its totient is φ = 56863308.

The previous prime is 56863307. The next prime is 56863319. The reversal of 56863309 is 90336865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56700900 + 162409 = 7530^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 56863309 - 2¹ = 56863307 is a prime.

Together with 56863307, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56863307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28431654 + 28431655.

It is an arithmetic number, because the mean of its divisors is an integer number (28431655).

Almost surely, 2^56863309 is an apocalyptic number.

It is an amenable number.

56863309 is a deficient number, since it is larger than the sum of its proper divisors (1).

56863309 is an equidigital number, since it uses as much as digits as its factorization.

56863309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 56863309 is about 7540.7764189107. The cubic root of 56863309 is about 384.5422321111.

The spelling of 56863309 in words is "fifty-six million, eight hundred sixty-three thousand, three hundred nine".