79765919 has 4 divisors (see below), whose sum is σ = 80108496. Its totient is φ = 79423344.

The previous prime is 79765879. The next prime is 79765927. The reversal of 79765919 is 91956797.

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

It is a cyclic number.

It is not a de Polignac number, because 79765919 - 2⁸ = 79765663 is a prime.

It is a super-2 number, since 2×79765919² = 12725203667829122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79765949) 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, 170939 + ... + 171404.

It is an arithmetic number, because the mean of its divisors is an integer number (20027124).

Almost surely, 2^79765919 is an apocalyptic number.

79765919 is a deficient number, since it is larger than the sum of its proper divisors (342577).

79765919 is a wasteful number, since it uses less digits than its factorization.

79765919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342576.

The product of its digits is 1071630, while the sum is 53.

The square root of 79765919 is about 8931.1767981605. The cubic root of 79765919 is about 430.4662672543.

The spelling of 79765919 in words is "seventy-nine million, seven hundred sixty-five thousand, nine hundred nineteen".