56173989 has 8 divisors (see below), whose sum is σ = 75054400. Its totient is φ = 37371456.

The previous prime is 56173969. The next prime is 56174003. The reversal of 56173989 is 98937165.

56173989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56173989 - 2¹⁵ = 56141221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56173969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17764 + ... + 20685.

It is an arithmetic number, because the mean of its divisors is an integer number (9381800).

Almost surely, 2^56173989 is an apocalyptic number.

It is an amenable number.

56173989 is a deficient number, since it is larger than the sum of its proper divisors (18880411).

56173989 is a wasteful number, since it uses less digits than its factorization.

56173989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38939.

The product of its digits is 408240, while the sum is 48.

The square root of 56173989 is about 7494.9308869395. The cubic root of 56173989 is about 382.9820518918.

The spelling of 56173989 in words is "fifty-six million, one hundred seventy-three thousand, nine hundred eighty-nine".