79783871 has 4 divisors (see below), whose sum is σ = 81136200. Its totient is φ = 78431544.

The previous prime is 79783861. The next prime is 79783883. The reversal of 79783871 is 17838797.

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 79783871 - 2⁶ = 79783807 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 (79783811) 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, 676076 + ... + 676193.

It is an arithmetic number, because the mean of its divisors is an integer number (20284050).

Almost surely, 2^79783871 is an apocalyptic number.

79783871 is a deficient number, since it is larger than the sum of its proper divisors (1352329).

79783871 is a wasteful number, since it uses less digits than its factorization.

79783871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352328.

The product of its digits is 592704, while the sum is 50.

The square root of 79783871 is about 8932.1817603540. The cubic root of 79783871 is about 430.4985581996.

The spelling of 79783871 in words is "seventy-nine million, seven hundred eighty-three thousand, eight hundred seventy-one".