90290249 has 24 divisors (see below), whose sum is σ = 110953920. Its totient is φ = 71916768.

The previous prime is 90290231. The next prime is 90290273. The reversal of 90290249 is 94209209.

It is not a de Polignac number, because 90290249 - 2⁸ = 90289993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90290209) 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, 136682 + ... + 137340.

It is an arithmetic number, because the mean of its divisors is an integer number (4623080).

Almost surely, 2^90290249 is an apocalyptic number.

It is an amenable number.

90290249 is a deficient number, since it is larger than the sum of its proper divisors (20663671).

90290249 is a wasteful number, since it uses less digits than its factorization.

90290249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 90290249 is about 9502.1181322903. The cubic root of 90290249 is about 448.6217070533.

The spelling of 90290249 in words is "ninety million, two hundred ninety thousand, two hundred forty-nine".