90397331 has 2 divisors, whose sum is σ = 90397332. Its totient is φ = 90397330.

The previous prime is 90397301. The next prime is 90397339. The reversal of 90397331 is 13379309.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (13379309) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90397331 - 2²⁶ = 23288467 is a prime.

It is a super-2 number, since 2×90397331² = 16343354903847122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90397291 and 90397300.

It is not a weakly prime, because it can be changed into another prime (90397339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45198665 + 45198666.

It is an arithmetic number, because the mean of its divisors is an integer number (45198666).

Almost surely, 2^90397331 is an apocalyptic number.

90397331 is a deficient number, since it is larger than the sum of its proper divisors (1).

90397331 is an equidigital number, since it uses as much as digits as its factorization.

90397331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15309, while the sum is 35.

The square root of 90397331 is about 9507.7511010754. The cubic root of 90397331 is about 448.7989884007.

The spelling of 90397331 in words is "ninety million, three hundred ninety-seven thousand, three hundred thirty-one".