90089181 has 48 divisors (see below), whose sum is σ = 161126784. Its totient is φ = 47233152.

The previous prime is 90089179. The next prime is 90089189. The reversal of 90089181 is 18198009.

It is not a de Polignac number, because 90089181 - 2¹ = 90089179 is a prime.

It is a super-2 number, since 2×90089181² = 16232121066501522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90089189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 259450 + ... + 259796.

It is an arithmetic number, because the mean of its divisors is an integer number (3356808).

Almost surely, 2^90089181 is an apocalyptic number.

90089181 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

90089181 is a deficient number, since it is larger than the sum of its proper divisors (71037603).

90089181 is a wasteful number, since it uses less digits than its factorization.

90089181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 90089181 is about 9491.5320681121. The cubic root of 90089181 is about 448.2884465901.

The spelling of 90089181 in words is "ninety million, eighty-nine thousand, one hundred eighty-one".