56316389 has 4 divisors (see below), whose sum is σ = 56331660. Its totient is φ = 56301120.

The previous prime is 56316373. The next prime is 56316409. The reversal of 56316389 is 98361365.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 46444225 + 9872164 = 6815^2 + 3142^2 .

It is a cyclic number.

It is not a de Polignac number, because 56316389 - 2⁴ = 56316373 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 (56316319) 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, 1709 + ... + 10749.

It is an arithmetic number, because the mean of its divisors is an integer number (14082915).

Almost surely, 2^56316389 is an apocalyptic number.

It is an amenable number.

56316389 is a deficient number, since it is larger than the sum of its proper divisors (15271).

56316389 is an equidigital number, since it uses as much as digits as its factorization.

56316389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15270.

The product of its digits is 116640, while the sum is 41.

The square root of 56316389 is about 7504.4246281777. The cubic root of 56316389 is about 383.3053962417.

The spelling of 56316389 in words is "fifty-six million, three hundred sixteen thousand, three hundred eighty-nine".