389172171 has 8 divisors (see below), whose sum is σ = 535634944. Its totient is φ = 251078760.

The previous prime is 389172151. The next prime is 389172181. The reversal of 389172171 is 171271983.

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

It is not a de Polignac number, because 389172171 - 2⁵ = 389172139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389172101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2092231 + ... + 2092416.

It is an arithmetic number, because the mean of its divisors is an integer number (66954368).

Almost surely, 2^389172171 is an apocalyptic number.

389172171 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

389172171 is a deficient number, since it is larger than the sum of its proper divisors (146462773).

389172171 is a wasteful number, since it uses less digits than its factorization.

389172171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4184681.

The product of its digits is 21168, while the sum is 39.

The square root of 389172171 is about 19727.4471485796. The cubic root of 389172171 is about 730.0970478345.

The spelling of 389172171 in words is "three hundred eighty-nine million, one hundred seventy-two thousand, one hundred seventy-one".