90000331 has 2 divisors, whose sum is σ = 90000332. Its totient is φ = 90000330.

The previous prime is 90000301. The next prime is 90000343. The reversal of 90000331 is 13300009.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90000331 - 2⁵ = 90000299 is a prime.

It is a super-2 number, since 2×90000331² = 16200119160219122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90000301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45000165 + 45000166.

It is an arithmetic number, because the mean of its divisors is an integer number (45000166).

Almost surely, 2^90000331 is an apocalyptic number.

90000331 is a deficient number, since it is larger than the sum of its proper divisors (1).

90000331 is an equidigital number, since it uses as much as digits as its factorization.

90000331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 90000331 is about 9486.8504257209. The cubic root of 90000331 is about 448.1410240421.

The spelling of 90000331 in words is "ninety million, three hundred thirty-one", and thus it is an aban number.