79779671 has 4 divisors (see below), whose sum is σ = 79875600. Its totient is φ = 79683744.

The previous prime is 79779653. The next prime is 79779673. The reversal of 79779671 is 17697797.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79779671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79779673) 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, 46706 + ... + 48383.

It is an arithmetic number, because the mean of its divisors is an integer number (19968900).

Almost surely, 2^79779671 is an apocalyptic number.

79779671 is a deficient number, since it is larger than the sum of its proper divisors (95929).

79779671 is an equidigital number, since it uses as much as digits as its factorization.

79779671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95928.

The product of its digits is 1166886, while the sum is 53.

The square root of 79779671 is about 8931.9466523261. The cubic root of 79779671 is about 430.4910039339.

The spelling of 79779671 in words is "seventy-nine million, seven hundred seventy-nine thousand, six hundred seventy-one".