79790691 has 4 divisors (see below), whose sum is σ = 106387592. Its totient is φ = 53193792.

The previous prime is 79790663. The next prime is 79790693. The reversal of 79790691 is 19609797.

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

It is not a de Polignac number, because 79790691 - 2¹⁰ = 79789667 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 79790691.

It is not an unprimeable number, because it can be changed into a prime (79790693) 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, 13298446 + ... + 13298451.

It is an arithmetic number, because the mean of its divisors is an integer number (26596898).

Almost surely, 2^79790691 is an apocalyptic number.

79790691 is a deficient number, since it is larger than the sum of its proper divisors (26596901).

79790691 is a wasteful number, since it uses less digits than its factorization.

79790691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26596900.

The product of its (nonzero) digits is 214326, while the sum is 48.

The square root of 79790691 is about 8932.5635178262. The cubic root of 79790691 is about 430.5108243234.

The spelling of 79790691 in words is "seventy-nine million, seven hundred ninety thousand, six hundred ninety-one".