56993729 has 18 divisors (see below), whose sum is σ = 64075986. Its totient is φ = 50668800.

The previous prime is 56993723. The next prime is 56993743. The reversal of 56993729 is 92739965.

It can be written as a sum of positive squares in 9 ways, for example, as 9314704 + 47679025 = 3052^2 + 6905^2 .

It is not a de Polignac number, because 56993729 - 2²⁴ = 40216513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56993723) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 141929 + ... + 142329.

It is an arithmetic number, because the mean of its divisors is an integer number (3559777).

Almost surely, 2^56993729 is an apocalyptic number.

It is an amenable number.

56993729 is a deficient number, since it is larger than the sum of its proper divisors (7082257).

56993729 is a wasteful number, since it uses less digits than its factorization.

56993729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 443 counting only the distinct ones).

The product of its digits is 918540, while the sum is 50.

The square root of 56993729 is about 7549.4191167268. The cubic root of 56993729 is about 384.8359991887.

The spelling of 56993729 in words is "fifty-six million, nine hundred ninety-three thousand, seven hundred twenty-nine".