90102093 has 4 divisors (see below), whose sum is σ = 120136128. Its totient is φ = 60068060.

The previous prime is 90102083. The next prime is 90102113. The reversal of 90102093 is 39020109.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90102093 - 2⁶ = 90102029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90102073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15017013 + ... + 15017018.

It is an arithmetic number, because the mean of its divisors is an integer number (30034032).

Almost surely, 2^90102093 is an apocalyptic number.

It is an amenable number.

90102093 is a deficient number, since it is larger than the sum of its proper divisors (30034035).

90102093 is a wasteful number, since it uses less digits than its factorization.

90102093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30034034.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 90102093 is about 9492.2122289801. The cubic root of 90102093 is about 448.3098624947.

The spelling of 90102093 in words is "ninety million, one hundred two thousand, ninety-three".