56971909 has 8 divisors (see below), whose sum is σ = 58126400. Its totient is φ = 55826496.

The previous prime is 56971867. The next prime is 56971931. The reversal of 56971909 is 90917965.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56971909 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 (56971949) 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, 11197 + ... + 15469.

It is an arithmetic number, because the mean of its divisors is an integer number (7265800).

Almost surely, 2^56971909 is an apocalyptic number.

It is an amenable number.

56971909 is a deficient number, since it is larger than the sum of its proper divisors (1154491).

56971909 is a wasteful number, since it uses less digits than its factorization.

56971909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539.

The product of its (nonzero) digits is 153090, while the sum is 46.

The square root of 56971909 is about 7547.9738340829. The cubic root of 56971909 is about 384.7868815431.

The spelling of 56971909 in words is "fifty-six million, nine hundred seventy-one thousand, nine hundred nine".