56931409 has 8 divisors (see below), whose sum is σ = 57392000. Its totient is φ = 56473200.

The previous prime is 56931403. The next prime is 56931451. The reversal of 56931409 is 90413965.

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 56931409 - 2¹⁹ = 56407121 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (56931403) 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, 113842 + ... + 114340.

It is an arithmetic number, because the mean of its divisors is an integer number (7174000).

Almost surely, 2^56931409 is an apocalyptic number.

It is an amenable number.

56931409 is a deficient number, since it is larger than the sum of its proper divisors (460591).

56931409 is a wasteful number, since it uses less digits than its factorization.

56931409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 56931409 is about 7545.2905179324. The cubic root of 56931409 is about 384.6956812588.

The spelling of 56931409 in words is "fifty-six million, nine hundred thirty-one thousand, four hundred nine".