90109131 has 8 divisors (see below), whose sum is σ = 137309184. Its totient is φ = 51490920.

The previous prime is 90109079. The next prime is 90109141. The reversal of 90109131 is 13190109.

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

It is not a de Polignac number, because 90109131 - 2¹⁰ = 90108107 is a prime.

It is a super-2 number, since 2×90109131² = 16239310979150322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90109141) 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 7 ways as a sum of consecutive naturals, for example, 2145435 + ... + 2145476.

It is an arithmetic number, because the mean of its divisors is an integer number (17163648).

Almost surely, 2^90109131 is an apocalyptic number.

90109131 is a deficient number, since it is larger than the sum of its proper divisors (47200053).

90109131 is a wasteful number, since it uses less digits than its factorization.

90109131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290921.

The product of its (nonzero) digits is 243, while the sum is 24.

The square root of 90109131 is about 9492.5829467011. The cubic root of 90109131 is about 448.3215348934.

The spelling of 90109131 in words is "ninety million, one hundred nine thousand, one hundred thirty-one".