79889263 has 4 divisors (see below), whose sum is σ = 82466368. Its totient is φ = 77312160.

The previous prime is 79889233. The next prime is 79889309. The reversal of 79889263 is 36298897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36298897 = 3299 ⋅11003.

It is a cyclic number.

It is not a de Polignac number, because 79889263 - 2⁹ = 79888751 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79889263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79889203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1288506 + ... + 1288567.

It is an arithmetic number, because the mean of its divisors is an integer number (20616592).

Almost surely, 2^79889263 is an apocalyptic number.

79889263 is a deficient number, since it is larger than the sum of its proper divisors (2577105).

79889263 is a wasteful number, since it uses less digits than its factorization.

79889263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577104.

The product of its digits is 1306368, while the sum is 52.

The square root of 79889263 is about 8938.0793798220. The cubic root of 79889263 is about 430.6880331740.

The spelling of 79889263 in words is "seventy-nine million, eight hundred eighty-nine thousand, two hundred sixty-three".