90031193 has 4 divisors (see below), whose sum is σ = 102892800. Its totient is φ = 77169588.

The previous prime is 90031171. The next prime is 90031199. The reversal of 90031193 is 39113009.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39113009 = 13 ⋅3008693.

It is a cyclic number.

It is not a de Polignac number, because 90031193 - 2⁶ = 90031129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90031199) 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, 6430793 + ... + 6430806.

It is an arithmetic number, because the mean of its divisors is an integer number (25723200).

Almost surely, 2^90031193 is an apocalyptic number.

It is an amenable number.

90031193 is a deficient number, since it is larger than the sum of its proper divisors (12861607).

90031193 is a wasteful number, since it uses less digits than its factorization.

90031193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12861606.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 90031193 is about 9488.4768535313. The cubic root of 90031193 is about 448.1922421786.

The spelling of 90031193 in words is "ninety million, thirty-one thousand, one hundred ninety-three".