79718929 has 4 divisors (see below), whose sum is σ = 79947700. Its totient is φ = 79490160.

The previous prime is 79718917. The next prime is 79718939. The reversal of 79718929 is 92981797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92981797 = 1103 ⋅84299.

It can be written as a sum of positive squares in 2 ways, for example, as 53217025 + 26501904 = 7295^2 + 5148^2 .

It is a cyclic number.

It is not a de Polignac number, because 79718929 - 2¹¹ = 79716881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79718939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113862 + ... + 114559.

It is an arithmetic number, because the mean of its divisors is an integer number (19986925).

Almost surely, 2^79718929 is an apocalyptic number.

It is an amenable number.

79718929 is a deficient number, since it is larger than the sum of its proper divisors (228771).

79718929 is a wasteful number, since it uses less digits than its factorization.

79718929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228770.

The product of its digits is 571536, while the sum is 52.

The square root of 79718929 is about 8928.5457382488. The cubic root of 79718929 is about 430.3817216093.

It can be divided in two parts, 7971 and 8929, that added together give a square (16900 = 130²).

The spelling of 79718929 in words is "seventy-nine million, seven hundred eighteen thousand, nine hundred twenty-nine".