56629609 has 2 divisors, whose sum is σ = 56629610. Its totient is φ = 56629608.

The previous prime is 56629607. The next prime is 56629627. The reversal of 56629609 is 90692665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51912025 + 4717584 = 7205^2 + 2172^2 .

It is a cyclic number.

It is not a de Polignac number, because 56629609 - 2¹ = 56629607 is a prime.

Together with 56629607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (56629607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28314804 + 28314805.

It is an arithmetic number, because the mean of its divisors is an integer number (28314805).

Almost surely, 2^56629609 is an apocalyptic number.

It is an amenable number.

56629609 is a deficient number, since it is larger than the sum of its proper divisors (1).

56629609 is an equidigital number, since it uses as much as digits as its factorization.

56629609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 56629609 is about 7525.2647129520. The cubic root of 56629609 is about 384.0147043885.

The spelling of 56629609 in words is "fifty-six million, six hundred twenty-nine thousand, six hundred nine".