99000031 has 6 divisors (see below), whose sum is σ = 107201400. Its totient is φ = 91384488.

The previous prime is 99000029. The next prime is 99000037. The reversal of 99000031 is 13000099.

It is not a de Polignac number, because 99000031 - 2¹ = 99000029 is a prime.

It is a super-2 number, since 2×99000031² = 19602012276001922, 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 = 98999966 and 99000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99000037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 292731 + ... + 293068.

It is an arithmetic number, because the mean of its divisors is an integer number (17866900).

Almost surely, 2^99000031 is an apocalyptic number.

99000031 is a deficient number, since it is larger than the sum of its proper divisors (8201369).

99000031 is a wasteful number, since it uses less digits than its factorization.

99000031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585825 (or 585812 counting only the distinct ones).

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

The square root of 99000031 is about 9949.8759288747. The cubic root of 99000031 is about 462.6065492038.

The spelling of 99000031 in words is "ninety-nine million, thirty-one", and thus it is an aban number and an uban number.