90171 has 12 divisors (see below), whose sum is σ = 133848. Its totient is φ = 58464.

The previous prime is 90163. The next prime is 90173. The reversal of 90171 is 17109.

It is not a de Polignac number, because 90171 - 2³ = 90163 is a prime.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (90173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 271 + ... + 503.

It is an arithmetic number, because the mean of its divisors is an integer number (11154).

2⁹⁰¹⁷¹ is an apocalyptic number.

90171 is a deficient number, since it is larger than the sum of its proper divisors (43677).

90171 is a wasteful number, since it uses less digits than its factorization.

90171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 63, while the sum is 18.

The square root of 90171 is about 300.2848647535. The cubic root of 90171 is about 44.8424117392.

The spelling of 90171 in words is "ninety thousand, one hundred seventy-one".