90498091 has 4 divisors (see below), whose sum is σ = 91772784. Its totient is φ = 89223400.

The previous prime is 90498071. The next prime is 90498103. The reversal of 90498091 is 19089409.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90498091 - 2⁵ = 90498059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90498061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637240 + ... + 637381.

It is an arithmetic number, because the mean of its divisors is an integer number (22943196).

Almost surely, 2^90498091 is an apocalyptic number.

90498091 is a deficient number, since it is larger than the sum of its proper divisors (1274693).

90498091 is a wasteful number, since it uses less digits than its factorization.

90498091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274692.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 90498091 is about 9513.0484598787. The cubic root of 90498091 is about 448.9656754564.

The spelling of 90498091 in words is "ninety million, four hundred ninety-eight thousand, ninety-one".