71994171 has 8 divisors (see below), whose sum is σ = 96391504. Its totient is φ = 47796480.

The previous prime is 71994161. The next prime is 71994191. The reversal of 71994171 is 17149917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71994171 - 2⁶ = 71994107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71994151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49066 + ... + 50511.

It is an arithmetic number, because the mean of its divisors is an integer number (12048938).

Almost surely, 2^71994171 is an apocalyptic number.

71994171 is a deficient number, since it is larger than the sum of its proper divisors (24397333).

71994171 is a wasteful number, since it uses less digits than its factorization.

71994171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99821.

The product of its digits is 15876, while the sum is 39.

The square root of 71994171 is about 8484.9378901675. The cubic root of 71994171 is about 416.0055376328.

The spelling of 71994171 in words is "seventy-one million, nine hundred ninety-four thousand, one hundred seventy-one".