90244813 has 32 divisors (see below), whose sum is σ = 104186880. Its totient is φ = 77760000.

The previous prime is 90244783. The next prime is 90244829. The reversal of 90244813 is 31844209.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90244813 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90244853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 893463 + ... + 893563.

It is an arithmetic number, because the mean of its divisors is an integer number (3255840).

Almost surely, 2^90244813 is an apocalyptic number.

It is an amenable number.

90244813 is a deficient number, since it is larger than the sum of its proper divisors (13942067).

90244813 is a wasteful number, since it uses less digits than its factorization.

90244813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 90244813 is about 9499.7269960773. The cubic root of 90244813 is about 448.5464423885.

The spelling of 90244813 in words is "ninety million, two hundred forty-four thousand, eight hundred thirteen".