90112813 has 12 divisors (see below), whose sum is σ = 105131712. Its totient is φ = 77013720.

The previous prime is 90112811. The next prime is 90112837. The reversal of 90112813 is 31821109.

It is not a de Polignac number, because 90112813 - 2¹ = 90112811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90112811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15478 + ... + 20488.

It is an arithmetic number, because the mean of its divisors is an integer number (8760976).

Almost surely, 2^90112813 is an apocalyptic number.

It is an amenable number.

90112813 is a deficient number, since it is larger than the sum of its proper divisors (15018899).

90112813 is a wasteful number, since it uses less digits than its factorization.

90112813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5392 (or 5385 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 90112813 is about 9492.7768856115. The cubic root of 90112813 is about 448.3276411832.

The spelling of 90112813 in words is "ninety million, one hundred twelve thousand, eight hundred thirteen".