72545677 has 4 divisors (see below), whose sum is σ = 72562876. Its totient is φ = 72528480.

The previous prime is 72545651. The next prime is 72545699. The reversal of 72545677 is 77654527.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 45981961 + 26563716 = 6781^2 + 5154^2 .

It is a cyclic number.

It is not a de Polignac number, because 72545677 - 2²³ = 64157069 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 (72545377) 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, 2527 + ... + 12307.

It is an arithmetic number, because the mean of its divisors is an integer number (18140719).

Almost surely, 2^72545677 is an apocalyptic number.

It is an amenable number.

72545677 is a deficient number, since it is larger than the sum of its proper divisors (17199).

72545677 is an equidigital number, since it uses as much as digits as its factorization.

72545677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17198.

The product of its digits is 411600, while the sum is 43.

The square root of 72545677 is about 8517.3750064207. The cubic root of 72545677 is about 417.0650965051.

The spelling of 72545677 in words is "seventy-two million, five hundred forty-five thousand, six hundred seventy-seven".