79899213 has 4 divisors (see below), whose sum is σ = 106532288. Its totient is φ = 53266140.

The previous prime is 79899163. The next prime is 79899221. The reversal of 79899213 is 31299897.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 79899213 - 2⁹ = 79898701 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79899293) 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, 13316533 + ... + 13316538.

It is an arithmetic number, because the mean of its divisors is an integer number (26633072).

Almost surely, 2^79899213 is an apocalyptic number.

It is an amenable number.

79899213 is a deficient number, since it is larger than the sum of its proper divisors (26633075).

79899213 is a wasteful number, since it uses less digits than its factorization.

79899213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26633074.

The product of its digits is 244944, while the sum is 48.

The square root of 79899213 is about 8938.6359697663. The cubic root of 79899213 is about 430.7059127900.

The spelling of 79899213 in words is "seventy-nine million, eight hundred ninety-nine thousand, two hundred thirteen".