90261131 has 8 divisors (see below), whose sum is σ = 96483744. Its totient is φ = 84230080.

The previous prime is 90261121. The next prime is 90261139. The reversal of 90261131 is 13116209.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 90261131 - 2²⁶ = 23152267 is a prime.

It is a super-2 number, since 2×90261131² = 16294143538798322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90261097 and 90261106.

It is not an unprimeable number, because it can be changed into a prime (90261139) 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, 46916 + ... + 48801.

It is an arithmetic number, because the mean of its divisors is an integer number (12060468).

Almost surely, 2^90261131 is an apocalyptic number.

90261131 is a deficient number, since it is larger than the sum of its proper divisors (6222613).

90261131 is a wasteful number, since it uses less digits than its factorization.

90261131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95781.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 90261131 is about 9500.5858240426. The cubic root of 90261131 is about 448.5734760372.

The spelling of 90261131 in words is "ninety million, two hundred sixty-one thousand, one hundred thirty-one".