90118331 has 2 divisors, whose sum is σ = 90118332. Its totient is φ = 90118330.

The previous prime is 90118321. The next prime is 90118337. The reversal of 90118331 is 13381109.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90118331 is a prime.

It is a super-2 number, since 2×90118331² = 16242627164451122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90118331.

It is not a weakly prime, because it can be changed into another prime (90118337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45059165 + 45059166.

It is an arithmetic number, because the mean of its divisors is an integer number (45059166).

Almost surely, 2^90118331 is an apocalyptic number.

90118331 is a deficient number, since it is larger than the sum of its proper divisors (1).

90118331 is an equidigital number, since it uses as much as digits as its factorization.

90118331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 90118331 is about 9493.0675231982. The cubic root of 90118331 is about 448.3367920145.

The spelling of 90118331 in words is "ninety million, one hundred eighteen thousand, three hundred thirty-one".