56439613 has 4 divisors (see below), whose sum is σ = 56520828. Its totient is φ = 56358400.

The previous prime is 56439583. The next prime is 56439629. The reversal of 56439613 is 31693465.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19740249 + 36699364 = 4443^2 + 6058^2 .

It is a cyclic number.

It is not a de Polignac number, because 56439613 - 2¹³ = 56431421 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 (56439653) 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, 39556 + ... + 40957.

It is an arithmetic number, because the mean of its divisors is an integer number (14130207).

Almost surely, 2^56439613 is an apocalyptic number.

It is an amenable number.

56439613 is a deficient number, since it is larger than the sum of its proper divisors (81215).

56439613 is an equidigital number, since it uses as much as digits as its factorization.

56439613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81214.

The product of its digits is 58320, while the sum is 37.

The square root of 56439613 is about 7512.6302318163. The cubic root of 56439613 is about 383.5847584757.

The spelling of 56439613 in words is "fifty-six million, four hundred thirty-nine thousand, six hundred thirteen".