79959969 has 12 divisors (see below), whose sum is σ = 115607700. Its totient is φ = 53255904.

The previous prime is 79959941. The next prime is 79959973. The reversal of 79959969 is 96995997.

It can be written as a sum of positive squares in 2 ways, for example, as 79441569 + 518400 = 8913^2 + 720^2 .

It is not a de Polignac number, because 79959969 - 2⁸ = 79959713 is a prime.

It is a super-2 number, since 2×79959969² = 12787193284961922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79959169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7447 + ... + 14675.

It is an arithmetic number, because the mean of its divisors is an integer number (9633975).

Almost surely, 2^79959969 is an apocalyptic number.

It is an amenable number.

79959969 is a deficient number, since it is larger than the sum of its proper divisors (35647731).

79959969 is a wasteful number, since it uses less digits than its factorization.

79959969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8464 (or 8461 counting only the distinct ones).

The product of its digits is 12400290, while the sum is 63.

The square root of 79959969 is about 8942.0338290570. The cubic root of 79959969 is about 430.8150558695.

The spelling of 79959969 in words is "seventy-nine million, nine hundred fifty-nine thousand, nine hundred sixty-nine".