56686809 has 8 divisors (see below), whose sum is σ = 75621280. Its totient is φ = 37771776.

The previous prime is 56686783. The next prime is 56686813. The reversal of 56686809 is 90868665.

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

It is not a de Polignac number, because 56686809 - 2¹² = 56682713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56686829) 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, 4554 + ... + 11580.

It is an arithmetic number, because the mean of its divisors is an integer number (9452660).

Almost surely, 2^56686809 is an apocalyptic number.

It is an amenable number.

56686809 is a deficient number, since it is larger than the sum of its proper divisors (18934471).

56686809 is a wasteful number, since it uses less digits than its factorization.

56686809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9719.

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 56686809 is about 7529.0642844911. The cubic root of 56686809 is about 384.1439550873.

The spelling of 56686809 in words is "fifty-six million, six hundred eighty-six thousand, eight hundred nine".