79719899 has 8 divisors (see below), whose sum is σ = 91365120. Its totient is φ = 68138856.

The previous prime is 79719853. The next prime is 79719901. The reversal of 79719899 is 99891797.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79719899 - 2²⁰ = 78671323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79719499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13349 + ... + 18374.

It is an arithmetic number, because the mean of its divisors is an integer number (11420640).

Almost surely, 2^79719899 is an apocalyptic number.

79719899 is a deficient number, since it is larger than the sum of its proper divisors (11645221).

79719899 is a wasteful number, since it uses less digits than its factorization.

79719899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32089.

The product of its digits is 2571912, while the sum is 59.

The square root of 79719899 is about 8928.6000582398. The cubic root of 79719899 is about 430.3834671946.

The spelling of 79719899 in words is "seventy-nine million, seven hundred nineteen thousand, eight hundred ninety-nine".