72714157 has 4 divisors (see below), whose sum is σ = 73531260. Its totient is φ = 71897056.

The previous prime is 72714143. The next prime is 72714163. The reversal of 72714157 is 75141727.

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 44475561 + 28238596 = 6669^2 + 5314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72714157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72714757) 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, 408418 + ... + 408595.

It is an arithmetic number, because the mean of its divisors is an integer number (18382815).

Almost surely, 2^72714157 is an apocalyptic number.

It is an amenable number.

72714157 is a deficient number, since it is larger than the sum of its proper divisors (817103).

72714157 is an equidigital number, since it uses as much as digits as its factorization.

72714157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817102.

The product of its digits is 13720, while the sum is 34.

The square root of 72714157 is about 8527.2596418779. The cubic root of 72714157 is about 417.3877107271.

It can be divided in two parts, 727 and 14157, that added together give a square (14884 = 122²).

The spelling of 72714157 in words is "seventy-two million, seven hundred fourteen thousand, one hundred fifty-seven".