79648731 has 8 divisors (see below), whose sum is σ = 117998160. Its totient is φ = 53099136.

The previous prime is 79648721. The next prime is 79648739. The reversal of 79648731 is 13784697.

It is not a de Polignac number, because 79648731 - 2²² = 75454427 is a prime.

It is a super-2 number, since 2×79648731² = 12687840699820722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79648739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1474950 + ... + 1475003.

It is an arithmetic number, because the mean of its divisors is an integer number (14749770).

Almost surely, 2^79648731 is an apocalyptic number.

79648731 is a deficient number, since it is larger than the sum of its proper divisors (38349429).

79648731 is a wasteful number, since it uses less digits than its factorization.

79648731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2949962 (or 2949956 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 79648731 is about 8924.6137731557. The cubic root of 79648731 is about 430.2553576089.

The spelling of 79648731 in words is "seventy-nine million, six hundred forty-eight thousand, seven hundred thirty-one".