79722477 has 12 divisors (see below), whose sum is σ = 115984960. Its totient is φ = 52765128.

The previous prime is 79722463. The next prime is 79722493. The reversal of 79722477 is 77422797.

It is a happy number.

It is not a de Polignac number, because 79722477 - 2⁸ = 79722221 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 (79722407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30613 + ... + 33114.

Almost surely, 2^79722477 is an apocalyptic number.

It is an amenable number.

79722477 is a deficient number, since it is larger than the sum of its proper divisors (36262483).

79722477 is a wasteful number, since it uses less digits than its factorization.

79722477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63872 (or 63869 counting only the distinct ones).

The product of its digits is 345744, while the sum is 45.

The square root of 79722477 is about 8928.7444246098. The cubic root of 79722477 is about 430.3881064237.

The spelling of 79722477 in words is "seventy-nine million, seven hundred twenty-two thousand, four hundred seventy-seven".