90638093 has 16 divisors (see below), whose sum is σ = 113836800. Its totient is φ = 71710128.

The previous prime is 90638089. The next prime is 90638117. The reversal of 90638093 is 39083609.

It is a happy number.

It is not a de Polignac number, because 90638093 - 2² = 90638089 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90638063) 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 15 ways as a sum of consecutive naturals, for example, 5705 + ... + 14622.

It is an arithmetic number, because the mean of its divisors is an integer number (7114800).

Almost surely, 2^90638093 is an apocalyptic number.

It is an amenable number.

90638093 is a deficient number, since it is larger than the sum of its proper divisors (23198707).

90638093 is a wasteful number, since it uses less digits than its factorization.

90638093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20361 (or 20347 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 90638093 is about 9520.4040355439. The cubic root of 90638093 is about 449.1970752075.

The spelling of 90638093 in words is "ninety million, six hundred thirty-eight thousand, ninety-three".