99000000031 has 2 divisors, whose sum is σ = 99000000032. Its totient is φ = 99000000030.

The previous prime is 98999999999. The next prime is 99000000053. The reversal of 99000000031 is 13000000099.

It is an a-pointer prime, because the next prime (99000000053) can be obtained adding 99000000031 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99000000031 - 2⁵ = 98999999999 is a prime.

It is a super-2 number, since 2×99000000031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 98999999939 and 99000000011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99000000131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49500000015 + 49500000016.

It is an arithmetic number, because the mean of its divisors is an integer number (49500000016).

Almost surely, 2^99000000031 is an apocalyptic number.

99000000031 is a deficient number, since it is larger than the sum of its proper divisors (1).

99000000031 is an equidigital number, since it uses as much as digits as its factorization.

99000000031 is an evil number, because the sum of its binary digits is even.

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

The spelling of 99000000031 in words is "ninety-nine billion, thirty-one", and thus it is an aban number and an uban number.