79825171 has 4 divisors (see below), whose sum is σ = 81178200. Its totient is φ = 78472144.

The previous prime is 79825147. The next prime is 79825177. The reversal of 79825171 is 17152897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17152897 = 1129 ⋅15193.

It is a cyclic number.

It is not a de Polignac number, because 79825171 - 2¹⁷ = 79694099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79825177) 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, 676426 + ... + 676543.

It is an arithmetic number, because the mean of its divisors is an integer number (20294550).

Almost surely, 2^79825171 is an apocalyptic number.

79825171 is a deficient number, since it is larger than the sum of its proper divisors (1353029).

79825171 is a wasteful number, since it uses less digits than its factorization.

79825171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353028.

The product of its digits is 35280, while the sum is 40.

The square root of 79825171 is about 8934.4933264288. The cubic root of 79825171 is about 430.5728276948.

The spelling of 79825171 in words is "seventy-nine million, eight hundred twenty-five thousand, one hundred seventy-one".