79490171 has 4 divisors (see below), whose sum is σ = 81638592. Its totient is φ = 77341752.

The previous prime is 79490149. The next prime is 79490209. The reversal of 79490171 is 17109497.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17109497 = 17 ⋅1006441.

It is a cyclic number.

It is not a de Polignac number, because 79490171 - 2¹⁰ = 79489147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79490111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074155 + ... + 1074228.

It is an arithmetic number, because the mean of its divisors is an integer number (20409648).

Almost surely, 2^79490171 is an apocalyptic number.

79490171 is a deficient number, since it is larger than the sum of its proper divisors (2148421).

79490171 is a wasteful number, since it uses less digits than its factorization.

79490171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148420.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 79490171 is about 8915.7260500758. The cubic root of 79490171 is about 429.9696589372.

The spelling of 79490171 in words is "seventy-nine million, four hundred ninety thousand, one hundred seventy-one".