79768191 has 4 divisors (see below), whose sum is σ = 106357592. Its totient is φ = 53178792.

The previous prime is 79768181. The next prime is 79768201. The reversal of 79768191 is 19186797.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (79768181) and next prime (79768201).

It is not a de Polignac number, because 79768191 - 2⁵ = 79768159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79768191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79768111) 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, 13294696 + ... + 13294701.

It is an arithmetic number, because the mean of its divisors is an integer number (26589398).

Almost surely, 2^79768191 is an apocalyptic number.

79768191 is a deficient number, since it is larger than the sum of its proper divisors (26589401).

79768191 is a wasteful number, since it uses less digits than its factorization.

79768191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26589400.

The product of its digits is 190512, while the sum is 48.

The square root of 79768191 is about 8931.3039921391. The cubic root of 79768191 is about 430.4703542549.

The spelling of 79768191 in words is "seventy-nine million, seven hundred sixty-eight thousand, one hundred ninety-one".