79399129 has 8 divisors (see below), whose sum is σ = 86969160. Its totient is φ = 72151296.

The previous prime is 79399123. The next prime is 79399147. The reversal of 79399129 is 92199397.

It can be written as a sum of positive squares in 4 ways, for example, as 27846729 + 51552400 = 5277^2 + 7180^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 79399129 - 2⁵ = 79399097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79399123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80034 + ... + 81019.

It is an arithmetic number, because the mean of its divisors is an integer number (10871145).

Almost surely, 2^79399129 is an apocalyptic number.

It is an amenable number.

79399129 is a deficient number, since it is larger than the sum of its proper divisors (7570031).

79399129 is a wasteful number, since it uses less digits than its factorization.

79399129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161099.

The product of its digits is 275562, while the sum is 49.

The square root of 79399129 is about 8910.6188898415. The cubic root of 79399129 is about 429.8054447063.

The spelling of 79399129 in words is "seventy-nine million, three hundred ninety-nine thousand, one hundred twenty-nine".