99023231 has 4 divisors (see below), whose sum is σ = 104235000. Its totient is φ = 93811464.

The previous prime is 99023227. The next prime is 99023237. The reversal of 99023231 is 13232099.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99023231 - 2² = 99023227 is a prime.

It is a super-2 number, since 2×99023231² = 19611200555358722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99023194 and 99023203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99023237) 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, 2605856 + ... + 2605893.

It is an arithmetic number, because the mean of its divisors is an integer number (26058750).

Almost surely, 2^99023231 is an apocalyptic number.

99023231 is a deficient number, since it is larger than the sum of its proper divisors (5211769).

99023231 is a wasteful number, since it uses less digits than its factorization.

99023231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5211768.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 99023231 is about 9951.0417042639. The cubic root of 99023231 is about 462.6426826392.

The spelling of 99023231 in words is "ninety-nine million, twenty-three thousand, two hundred thirty-one".