79980071 has 4 divisors (see below), whose sum is σ = 80517000. Its totient is φ = 79443144.

The previous prime is 79980059. The next prime is 79980073. The reversal of 79980071 is 17008997.

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 79980071 - 2¹⁴ = 79963687 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 (79980073) 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, 268241 + ... + 268538.

It is an arithmetic number, because the mean of its divisors is an integer number (20129250).

Almost surely, 2^79980071 is an apocalyptic number.

79980071 is a deficient number, since it is larger than the sum of its proper divisors (536929).

79980071 is a wasteful number, since it uses less digits than its factorization.

79980071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536928.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 79980071 is about 8943.1577756405. The cubic root of 79980071 is about 430.8511552608.

The spelling of 79980071 in words is "seventy-nine million, nine hundred eighty thousand, seventy-one".