90421835 has 16 divisors (see below), whose sum is σ = 124260096. Its totient is φ = 61877088.

The previous prime is 90421829. The next prime is 90421853. The reversal of 90421835 is 53812409.

It is a de Polignac number, because none of the positive numbers 2^k-90421835 is a prime.

It is a super-2 number, since 2×90421835² = 16352216489534450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16784 + ... + 21506.

It is an arithmetic number, because the mean of its divisors is an integer number (7766256).

Almost surely, 2^90421835 is an apocalyptic number.

90421835 is a deficient number, since it is larger than the sum of its proper divisors (33838261).

90421835 is a wasteful number, since it uses less digits than its factorization.

90421835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5282.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 90421835 is about 9509.0396465679. The cubic root of 90421835 is about 448.8395367102.

The spelling of 90421835 in words is "ninety million, four hundred twenty-one thousand, eight hundred thirty-five".