90232109 has 4 divisors (see below), whose sum is σ = 98435040. Its totient is φ = 82029180.

The previous prime is 90232099. The next prime is 90232127. The reversal of 90232109 is 90123209.

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 90232109 - 2⁸ = 90231853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90232199) 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 3 ways as a sum of consecutive naturals, for example, 4101449 + ... + 4101470.

It is an arithmetic number, because the mean of its divisors is an integer number (24608760).

Almost surely, 2^90232109 is an apocalyptic number.

It is an amenable number.

90232109 is a deficient number, since it is larger than the sum of its proper divisors (8202931).

90232109 is a wasteful number, since it uses less digits than its factorization.

90232109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8202930.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 90232109 is about 9499.0583217496. The cubic root of 90232109 is about 448.5253937127.

Subtracting from 90232109 its reverse (90123209), we obtain a square (108900 = 330²).

The spelling of 90232109 in words is "ninety million, two hundred thirty-two thousand, one hundred nine".