79646691 has 4 divisors (see below), whose sum is σ = 106195592. Its totient is φ = 53097792.

The previous prime is 79646659. The next prime is 79646729. The reversal of 79646691 is 19664697.

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

It is not a de Polignac number, because 79646691 - 2⁵ = 79646659 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 79646691.

It is not an unprimeable number, because it can be changed into a prime (79646491) 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, 13274446 + ... + 13274451.

It is an arithmetic number, because the mean of its divisors is an integer number (26548898).

Almost surely, 2^79646691 is an apocalyptic number.

79646691 is a deficient number, since it is larger than the sum of its proper divisors (26548901).

79646691 is a wasteful number, since it uses less digits than its factorization.

79646691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26548900.

The product of its digits is 489888, while the sum is 48.

The square root of 79646691 is about 8924.4994817637. The cubic root of 79646691 is about 430.2516842781.

The spelling of 79646691 in words is "seventy-nine million, six hundred forty-six thousand, six hundred ninety-one".