56643723 has 6 divisors (see below), whose sum is σ = 81818724. Its totient is φ = 37762476.

The previous prime is 56643709. The next prime is 56643749. The reversal of 56643723 is 32734665.

56643723 is a `hidden beast` number, since 5 + 6 + 643 + 7 + 2 + 3 = 666.

It is not a de Polignac number, because 56643723 - 2⁶ = 56643659 is a prime.

It is a super-2 number, since 2×56643723² = 6417022710601458, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56643773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3146865 + ... + 3146882.

It is an arithmetic number, because the mean of its divisors is an integer number (13636454).

Almost surely, 2^56643723 is an apocalyptic number.

56643723 is a deficient number, since it is larger than the sum of its proper divisors (25175001).

56643723 is a wasteful number, since it uses less digits than its factorization.

56643723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6293753 (or 6293750 counting only the distinct ones).

The product of its digits is 90720, while the sum is 36.

The square root of 56643723 is about 7526.2024288482. The cubic root of 56643723 is about 384.0466048578.

The spelling of 56643723 in words is "fifty-six million, six hundred forty-three thousand, seven hundred twenty-three".