79691767 has 4 divisors (see below), whose sum is σ = 84379536. Its totient is φ = 75004000.

The previous prime is 79691761. The next prime is 79691779. The reversal of 79691767 is 76719697.

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

It is not a de Polignac number, because 79691767 - 2¹⁹ = 79167479 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 (79691761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2343859 + ... + 2343892.

It is an arithmetic number, because the mean of its divisors is an integer number (21094884).

Almost surely, 2^79691767 is an apocalyptic number.

79691767 is a deficient number, since it is larger than the sum of its proper divisors (4687769).

79691767 is a wasteful number, since it uses less digits than its factorization.

79691767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4687768.

The product of its digits is 1000188, while the sum is 52.

The square root of 79691767 is about 8927.0245322840. The cubic root of 79691767 is about 430.3328358704.

The spelling of 79691767 in words is "seventy-nine million, six hundred ninety-one thousand, seven hundred sixty-seven".