79191291 has 4 divisors (see below), whose sum is σ = 105588392. Its totient is φ = 52794192.

The previous prime is 79191289. The next prime is 79191311. The reversal of 79191291 is 19219197.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 79191291 - 2¹ = 79191289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79191991) 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, 13198546 + ... + 13198551.

It is an arithmetic number, because the mean of its divisors is an integer number (26397098).

Almost surely, 2^79191291 is an apocalyptic number.

79191291 is a deficient number, since it is larger than the sum of its proper divisors (26397101).

79191291 is a wasteful number, since it uses less digits than its factorization.

79191291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26397100.

The product of its digits is 10206, while the sum is 39.

The square root of 79191291 is about 8898.9488705127. The cubic root of 79191291 is about 429.4300923018.

The spelling of 79191291 in words is "seventy-nine million, one hundred ninety-one thousand, two hundred ninety-one".