79999963 has 4 divisors (see below), whose sum is σ = 80021448. Its totient is φ = 79978480.

The previous prime is 79999879. The next prime is 79999973. The reversal of 79999963 is 36999997.

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

It is a cyclic number.

It is not a de Polignac number, because 79999963 - 2¹³ = 79991771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79999973) 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, 3553 + ... + 13138.

It is an arithmetic number, because the mean of its divisors is an integer number (20005362).

Almost surely, 2^79999963 is an apocalyptic number.

79999963 is a deficient number, since it is larger than the sum of its proper divisors (21485).

79999963 is a wasteful number, since it uses less digits than its factorization.

79999963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21484.

The product of its digits is 7440174, while the sum is 61.

The square root of 79999963 is about 8944.2698416360. The cubic root of 79999963 is about 430.8868715780.

The spelling of 79999963 in words is "seventy-nine million, nine hundred ninety-nine thousand, nine hundred sixty-three".