72644227 has 2 divisors, whose sum is σ = 72644228. Its totient is φ = 72644226.

The previous prime is 72644207. The next prime is 72644233. The reversal of 72644227 is 72244627.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72644227 - 2¹⁵ = 72611459 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72644192 and 72644201.

It is not a weakly prime, because it can be changed into another prime (72644207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36322113 + 36322114.

It is an arithmetic number, because the mean of its divisors is an integer number (36322114).

Almost surely, 2^72644227 is an apocalyptic number.

72644227 is a deficient number, since it is larger than the sum of its proper divisors (1).

72644227 is an equidigital number, since it uses as much as digits as its factorization.

72644227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 34.

The square root of 72644227 is about 8523.1582761322. The cubic root of 72644227 is about 417.2538657025.

The spelling of 72644227 in words is "seventy-two million, six hundred forty-four thousand, two hundred twenty-seven".