56704909 has 4 divisors (see below), whose sum is σ = 56774304. Its totient is φ = 56635516.

The previous prime is 56704903. The next prime is 56704933. The reversal of 56704909 is 90940765.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56704909 - 2¹⁵ = 56672141 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 (56704903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33457 + ... + 35110.

It is an arithmetic number, because the mean of its divisors is an integer number (14193576).

Almost surely, 2^56704909 is an apocalyptic number.

It is an amenable number.

56704909 is a deficient number, since it is larger than the sum of its proper divisors (69395).

56704909 is an equidigital number, since it uses as much as digits as its factorization.

56704909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69394.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 56704909 is about 7530.2661971540. The cubic root of 56704909 is about 384.1848362365.

The spelling of 56704909 in words is "fifty-six million, seven hundred four thousand, nine hundred nine".