79129317 has 4 divisors (see below), whose sum is σ = 105505760. Its totient is φ = 52752876.

The previous prime is 79129307. The next prime is 79129343. The reversal of 79129317 is 71392197.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 79129317 - 2⁴ = 79129301 is a prime.

It is a super-2 number, since 2×79129317² = 12522897617772978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79129307) 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, 13188217 + ... + 13188222.

It is an arithmetic number, because the mean of its divisors is an integer number (26376440).

Almost surely, 2^79129317 is an apocalyptic number.

It is an amenable number.

79129317 is a deficient number, since it is larger than the sum of its proper divisors (26376443).

79129317 is a wasteful number, since it uses less digits than its factorization.

79129317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26376442.

The product of its digits is 23814, while the sum is 39.

The square root of 79129317 is about 8895.4660923416. The cubic root of 79129317 is about 429.3180410663.

The spelling of 79129317 in words is "seventy-nine million, one hundred twenty-nine thousand, three hundred seventeen".