56639677 has 4 divisors (see below), whose sum is σ = 56791900. Its totient is φ = 56487456.

The previous prime is 56639663. The next prime is 56639707. The reversal of 56639677 is 77693665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14791716 + 41847961 = 3846^2 + 6469^2 .

It is a cyclic number.

It is not a de Polignac number, because 56639677 - 2⁷ = 56639549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56639677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56639617) 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 in 3 ways as a sum of consecutive naturals, for example, 75552 + ... + 76297.

It is an arithmetic number, because the mean of its divisors is an integer number (14197975).

Almost surely, 2^56639677 is an apocalyptic number.

It is an amenable number.

56639677 is a deficient number, since it is larger than the sum of its proper divisors (152223).

56639677 is a wasteful number, since it uses less digits than its factorization.

56639677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152222.

The product of its digits is 1428840, while the sum is 49.

The square root of 56639677 is about 7525.9336297897. The cubic root of 56639677 is about 384.0374606286.

The spelling of 56639677 in words is "fifty-six million, six hundred thirty-nine thousand, six hundred seventy-seven".