72774417 has 4 divisors (see below), whose sum is σ = 97032560. Its totient is φ = 48516276.

The previous prime is 72774413. The next prime is 72774421. The reversal of 72774417 is 71447727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (72774413) and next prime (72774421).

It is not a de Polignac number, because 72774417 - 2² = 72774413 is a prime.

It is a super-2 number, since 2×72774417² = 10592231539379778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72774413) 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, 12129067 + ... + 12129072.

It is an arithmetic number, because the mean of its divisors is an integer number (24258140).

Almost surely, 2^72774417 is an apocalyptic number.

It is an amenable number.

72774417 is a deficient number, since it is larger than the sum of its proper divisors (24258143).

72774417 is a wasteful number, since it uses less digits than its factorization.

72774417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24258142.

The product of its digits is 76832, while the sum is 39.

The square root of 72774417 is about 8530.7922844247. The cubic root of 72774417 is about 417.5029786920.

The spelling of 72774417 in words is "seventy-two million, seven hundred seventy-four thousand, four hundred seventeen".