56990609 has 16 divisors (see below), whose sum is σ = 63201600. Its totient is φ = 51057216.

The previous prime is 56990603. The next prime is 56990611. The reversal of 56990609 is 90609965.

It is a cyclic number.

It is not a de Polignac number, because 56990609 - 2¹⁶ = 56925073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56990609.

It is not an unprimeable number, because it can be changed into a prime (56990603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150182 + ... + 150560.

It is an arithmetic number, because the mean of its divisors is an integer number (3950100).

Almost surely, 2^56990609 is an apocalyptic number.

It is an amenable number.

56990609 is a deficient number, since it is larger than the sum of its proper divisors (6210991).

56990609 is a wasteful number, since it uses less digits than its factorization.

56990609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704.

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 56990609 is about 7549.2124754838. The cubic root of 56990609 is about 384.8289767188.

The spelling of 56990609 in words is "fifty-six million, nine hundred ninety thousand, six hundred nine".