79489799 has 4 divisors (see below), whose sum is σ = 79552200. Its totient is φ = 79427400.

The previous prime is 79489789. The next prime is 79489811. The reversal of 79489799 is 99798497.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79489799 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 (79489759) 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, 29249 + ... + 31850.

It is an arithmetic number, because the mean of its divisors is an integer number (19888050).

Almost surely, 2^79489799 is an apocalyptic number.

79489799 is a deficient number, since it is larger than the sum of its proper divisors (62401).

79489799 is a wasteful number, since it uses less digits than its factorization.

79489799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62400.

The product of its digits is 10287648, while the sum is 62.

The square root of 79489799 is about 8915.7051880376. The cubic root of 79489799 is about 429.9689882088.

The spelling of 79489799 in words is "seventy-nine million, four hundred eighty-nine thousand, seven hundred ninety-nine".