79900071 has 4 divisors (see below), whose sum is σ = 106533432. Its totient is φ = 53266712.

The previous prime is 79900069. The next prime is 79900081. The reversal of 79900071 is 17000997.

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 79900071 - 2¹ = 79900069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79900001) 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, 13316676 + ... + 13316681.

It is an arithmetic number, because the mean of its divisors is an integer number (26633358).

Almost surely, 2^79900071 is an apocalyptic number.

79900071 is a deficient number, since it is larger than the sum of its proper divisors (26633361).

79900071 is a wasteful number, since it uses less digits than its factorization.

79900071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26633360.

The product of its (nonzero) digits is 3969, while the sum is 33.

The square root of 79900071 is about 8938.6839635374. The cubic root of 79900071 is about 430.7074545005.

The spelling of 79900071 in words is "seventy-nine million, nine hundred thousand, seventy-one".