90172 has 6 divisors (see below), whose sum is σ = 157808. Its totient is φ = 45084.
The previous prime is 90163. The next prime is 90173. The reversal of 90172 is 27109.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (90173) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11268 + ... + 11275.
290172 is an apocalyptic number.
It is an amenable number.
90172 is a deficient number, since it is larger than the sum of its proper divisors (67636).
90172 is a wasteful number, since it uses less digits than its factorization.
90172 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 22547 (or 22545 counting only the distinct ones).
The product of its (nonzero) digits is 126, while the sum is 19.
The square root of 90172 is about 300.2865298344. The cubic root of 90172 is about 44.8425775066.
It can be divided in two parts, 90 and 172, that added together give a palindrome (262).
The spelling of 90172 in words is "ninety thousand, one hundred seventy-two".
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