56772689 has 4 divisors (see below), whose sum is σ = 58307124. Its totient is φ = 55238256.

The previous prime is 56772679. The next prime is 56772697. The reversal of 56772689 is 98627765.

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 35796289 + 20976400 = 5983^2 + 4580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56772689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56772679) 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, 767162 + ... + 767235.

It is an arithmetic number, because the mean of its divisors is an integer number (14576781).

Almost surely, 2^56772689 is an apocalyptic number.

It is an amenable number.

56772689 is a deficient number, since it is larger than the sum of its proper divisors (1534435).

56772689 is a wasteful number, since it uses less digits than its factorization.

56772689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534434.

The product of its digits is 1270080, while the sum is 50.

The square root of 56772689 is about 7534.7653579922. The cubic root of 56772689 is about 384.3378487371.

The spelling of 56772689 in words is "fifty-six million, seven hundred seventy-two thousand, six hundred eighty-nine".