56639 has 8 divisors (see below), whose sum is σ = 65280. Its totient is φ = 48600.

The previous prime is 56633. The next prime is 56659. The reversal of 56639 is 93665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56639 - 2⁸ = 56383 is a prime.

It is a d-powerful number, because it can be written as 5⁵ + 6³ + 6⁶ + 3⁸ + 9² .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74 + ... + 344.

It is an arithmetic number, because the mean of its divisors is an integer number (8160).

2⁵⁶⁶³⁹ is an apocalyptic number.

56639 is a deficient number, since it is larger than the sum of its proper divisors (8641).

56639 is a wasteful number, since it uses less digits than its factorization.

56639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301.

The product of its digits is 4860, while the sum is 29.

The square root of 56639 is about 237.9894955665. The cubic root of 56639 is about 38.4035930521.

The spelling of 56639 in words is "fifty-six thousand, six hundred thirty-nine".