56764891 has 4 divisors (see below), whose sum is σ = 57295512. Its totient is φ = 56234272.

The previous prime is 56764889. The next prime is 56764901. The reversal of 56764891 is 19846765.

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

It is a cyclic number.

It is not a de Polignac number, because 56764891 - 2¹ = 56764889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56764811) 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, 265150 + ... + 265363.

It is an arithmetic number, because the mean of its divisors is an integer number (14323878).

Almost surely, 2^56764891 is an apocalyptic number.

56764891 is a deficient number, since it is larger than the sum of its proper divisors (530621).

56764891 is a wasteful number, since it uses less digits than its factorization.

56764891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530620.

The product of its digits is 362880, while the sum is 46.

The square root of 56764891 is about 7534.2478722166. The cubic root of 56764891 is about 384.3202510516.

The spelling of 56764891 in words is "fifty-six million, seven hundred sixty-four thousand, eight hundred ninety-one".