90949131 has 24 divisors (see below), whose sum is σ = 161688800. Its totient is φ = 47972736.

The previous prime is 90949129. The next prime is 90949141. The reversal of 90949131 is 13194909.

It is not a de Polignac number, because 90949131 - 2¹ = 90949129 is a prime.

It is a super-2 number, since 2×90949131² = 16543488859310322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90949141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54706 + ... + 56343.

Almost surely, 2^90949131 is an apocalyptic number.

90949131 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

90949131 is a deficient number, since it is larger than the sum of its proper divisors (70739669).

90949131 is a wasteful number, since it uses less digits than its factorization.

90949131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111075 (or 111072 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 90949131 is about 9536.7253813875. The cubic root of 90949131 is about 449.7103172635.

It can be divided in two parts, 9094 and 9131, that added together give a square (18225 = 135²).

The spelling of 90949131 in words is "ninety million, nine hundred forty-nine thousand, one hundred thirty-one".