72713557 has 8 divisors (see below), whose sum is σ = 86714496. Its totient is φ = 59615952.

The previous prime is 72713549. The next prime is 72713567. The reversal of 72713557 is 75531727.

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

It is a cyclic number.

It is not a de Polignac number, because 72713557 - 2³ = 72713549 is a prime.

It is a super-2 number, since 2×72713557² = 10574522743184498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72713567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225658 + ... + 225979.

It is an arithmetic number, because the mean of its divisors is an integer number (10839312).

Almost surely, 2^72713557 is an apocalyptic number.

It is an amenable number.

72713557 is a deficient number, since it is larger than the sum of its proper divisors (14000939).

72713557 is a wasteful number, since it uses less digits than its factorization.

72713557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451667.

The product of its digits is 51450, while the sum is 37.

The square root of 72713557 is about 8527.2244605147. The cubic root of 72713557 is about 417.3865627007.

The spelling of 72713557 in words is "seventy-two million, seven hundred thirteen thousand, five hundred fifty-seven".