56606509 has 4 divisors (see below), whose sum is σ = 56806816. Its totient is φ = 56406204.

The previous prime is 56606489. The next prime is 56606513. The reversal of 56606509 is 90560665.

It is a happy number.

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 56606509 - 2²³ = 48217901 is a prime.

It is a super-2 number, since 2×56606509² = 6408593722334162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56606569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99729 + ... + 100294.

It is an arithmetic number, because the mean of its divisors is an integer number (14201704).

Almost surely, 2^56606509 is an apocalyptic number.

It is an amenable number.

56606509 is a deficient number, since it is larger than the sum of its proper divisors (200307).

56606509 is a wasteful number, since it uses less digits than its factorization.

56606509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200306.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 56606509 is about 7523.7297266715. The cubic root of 56606509 is about 383.9624823191.

The spelling of 56606509 in words is "fifty-six million, six hundred six thousand, five hundred nine".