79822919 has 4 divisors (see below), whose sum is σ = 87079560. Its totient is φ = 72566280.

The previous prime is 79822901. The next prime is 79822937. The reversal of 79822919 is 91922897.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (79822901) and next prime (79822937).

It is a cyclic number.

It is not a de Polignac number, because 79822919 - 2²⁰ = 78774343 is a prime.

It is a super-2 number, since 2×79822919² = 12743396795361122, 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 (79822019) 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, 3628304 + ... + 3628325.

It is an arithmetic number, because the mean of its divisors is an integer number (21769890).

Almost surely, 2^79822919 is an apocalyptic number.

79822919 is a deficient number, since it is larger than the sum of its proper divisors (7256641).

79822919 is a wasteful number, since it uses less digits than its factorization.

79822919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7256640.

The product of its digits is 163296, while the sum is 47.

The square root of 79822919 is about 8934.3672971285. The cubic root of 79822919 is about 430.5687785997.

It can be divided in two parts, 7982 and 2919, that added together give a palindrome (10901).

The spelling of 79822919 in words is "seventy-nine million, eight hundred twenty-two thousand, nine hundred nineteen".