79999903 has 4 divisors (see below), whose sum is σ = 81012640. Its totient is φ = 78987168.

The previous prime is 79999879. The next prime is 79999973. The reversal of 79999903 is 30999997.

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 79999903 - 2¹³ = 79991711 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 (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, 506250 + ... + 506407.

It is an arithmetic number, because the mean of its divisors is an integer number (20253160).

Almost surely, 2^79999903 is an apocalyptic number.

79999903 is a deficient number, since it is larger than the sum of its proper divisors (1012737).

79999903 is a wasteful number, since it uses less digits than its factorization.

79999903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012736.

The product of its (nonzero) digits is 1240029, while the sum is 55.

The square root of 79999903 is about 8944.2664875327. The cubic root of 79999903 is about 430.8867638562.

The spelling of 79999903 in words is "seventy-nine million, nine hundred ninety-nine thousand, nine hundred three".