79744669 has 2 divisors, whose sum is σ = 79744670. Its totient is φ = 79744668.

The previous prime is 79744667. The next prime is 79744681. The reversal of 79744669 is 96644797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74736025 + 5008644 = 8645^2 + 2238^2 .

It is a cyclic number.

It is not a de Polignac number, because 79744669 - 2¹ = 79744667 is a prime.

It is a super-2 number, since 2×79744669² = 12718424467839122, which contains 22 as substring.

Together with 79744667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79744667) 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 as a sum of consecutive naturals, namely, 39872334 + 39872335.

It is an arithmetic number, because the mean of its divisors is an integer number (39872335).

Almost surely, 2^79744669 is an apocalyptic number.

It is an amenable number.

79744669 is a deficient number, since it is larger than the sum of its proper divisors (1).

79744669 is an equidigital number, since it uses as much as digits as its factorization.

79744669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 52.

The square root of 79744669 is about 8929.9870660601. The cubic root of 79744669 is about 430.4280378087.

The spelling of 79744669 in words is "seventy-nine million, seven hundred forty-four thousand, six hundred sixty-nine".