79961631 has 8 divisors (see below), whose sum is σ = 107058864. Its totient is φ = 53086080.

The previous prime is 79961621. The next prime is 79961653. The reversal of 79961631 is 13616997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79961631 - 2⁷ = 79961503 is a prime.

It is a super-2 number, since 2×79961631² = 12787724864360322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79961621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54576 + ... + 56021.

It is an arithmetic number, because the mean of its divisors is an integer number (13382358).

Almost surely, 2^79961631 is an apocalyptic number.

79961631 is a deficient number, since it is larger than the sum of its proper divisors (27097233).

79961631 is a wasteful number, since it uses less digits than its factorization.

79961631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110841.

The product of its digits is 61236, while the sum is 42.

The square root of 79961631 is about 8942.1267604525. The cubic root of 79961631 is about 430.8180407367.

The spelling of 79961631 in words is "seventy-nine million, nine hundred sixty-one thousand, six hundred thirty-one".