72645227 has 4 divisors (see below), whose sum is σ = 76468680. Its totient is φ = 68821776.

The previous prime is 72645217. The next prime is 72645229. The reversal of 72645227 is 72254627.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72645227 - 2⁴ = 72645211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72645229) 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, 1911698 + ... + 1911735.

It is an arithmetic number, because the mean of its divisors is an integer number (19117170).

Almost surely, 2^72645227 is an apocalyptic number.

72645227 is a deficient number, since it is larger than the sum of its proper divisors (3823453).

72645227 is a wasteful number, since it uses less digits than its factorization.

72645227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3823452.

The product of its digits is 47040, while the sum is 35.

The square root of 72645227 is about 8523.2169396302. The cubic root of 72645227 is about 417.2557802935.

The spelling of 72645227 in words is "seventy-two million, six hundred forty-five thousand, two hundred twenty-seven".