90099000031 has 2 divisors, whose sum is σ = 90099000032. Its totient is φ = 90099000030.

The previous prime is 90099000029. The next prime is 90099000041. The reversal of 90099000031 is 13000099009.

It is a weak prime.

It is an emirp because it is prime and its reverse (13000099009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90099000031 - 2¹ = 90099000029 is a prime.

It is a super-2 number, since 2×90099000031² (a number of 23 digits) contains 22 as substring.

Together with 90099000029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 90098999957 and 90099000002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90099000041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45049500015 + 45049500016.

It is an arithmetic number, because the mean of its divisors is an integer number (45049500016).

Almost surely, 2^90099000031 is an apocalyptic number.

90099000031 is a deficient number, since it is larger than the sum of its proper divisors (1).

90099000031 is an equidigital number, since it uses as much as digits as its factorization.

90099000031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2187, while the sum is 31.

The spelling of 90099000031 in words is "ninety billion, ninety-nine million, thirty-one", and thus it is an aban number and an uban number.