99031 has 4 divisors (see below), whose sum is σ = 99792. Its totient is φ = 98272.

The previous prime is 99023. The next prime is 99041. The reversal of 99031 is 13099.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 99031 - 2³ = 99023 is a prime.

It is a super-2 number, since 2×99031² = 19614277922, 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 = 98993 and 99011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99041) 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, 130 + ... + 463.

It is an arithmetic number, because the mean of its divisors is an integer number (24948).

2⁹⁹⁰³¹ is an apocalyptic number.

99031 is a deficient number, since it is larger than the sum of its proper divisors (761).

99031 is a wasteful number, since it uses less digits than its factorization.

99031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760.

The product of its (nonzero) digits is 243, while the sum is 22.

The square root of 99031 is about 314.6919128290. The cubic root of 99031 is about 46.2654781406.

The spelling of 99031 in words is "ninety-nine thousand, thirty-one".