79871983 has 4 divisors (see below), whose sum is σ = 79930080. Its totient is φ = 79813888.

The previous prime is 79871929. The next prime is 79872019. The reversal of 79871983 is 38917897.

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 79871983 - 2¹⁷ = 79740911 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 79871983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79872983) 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, 26935 + ... + 29752.

It is an arithmetic number, because the mean of its divisors is an integer number (19982520).

Almost surely, 2^79871983 is an apocalyptic number.

79871983 is a deficient number, since it is larger than the sum of its proper divisors (58097).

79871983 is a wasteful number, since it uses less digits than its factorization.

79871983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58096.

The product of its digits is 762048, while the sum is 52.

The square root of 79871983 is about 8937.1126769220. The cubic root of 79871983 is about 430.6569784132.

The spelling of 79871983 in words is "seventy-nine million, eight hundred seventy-one thousand, nine hundred eighty-three".