56039909 has 8 divisors (see below), whose sum is σ = 57946368. Its totient is φ = 54139680.

The previous prime is 56039903. The next prime is 56039917. The reversal of 56039909 is 90993065.

It is a happy number.

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 56039909 - 2²⁰ = 54991333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56039903) 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, 23249 + ... + 25545.

It is an arithmetic number, because the mean of its divisors is an integer number (7243296).

Almost surely, 2^56039909 is an apocalyptic number.

It is an amenable number.

56039909 is a deficient number, since it is larger than the sum of its proper divisors (1906459).

56039909 is a wasteful number, since it uses less digits than its factorization.

56039909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3115.

The product of its (nonzero) digits is 65610, while the sum is 41.

The square root of 56039909 is about 7485.9808308598. The cubic root of 56039909 is about 382.6770996999.

The spelling of 56039909 in words is "fifty-six million, thirty-nine thousand, nine hundred nine".