90175331 has 2 divisors, whose sum is σ = 90175332. Its totient is φ = 90175330.

The previous prime is 90175321. The next prime is 90175333. The reversal of 90175331 is 13357109.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90175331 is a prime.

It is a super-2 number, since 2×90175331² = 16263180641919122, which contains 22 as substring.

Together with 90175333, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 90175294 and 90175303.

It is not a weakly prime, because it can be changed into another prime (90175333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45087665 + 45087666.

It is an arithmetic number, because the mean of its divisors is an integer number (45087666).

Almost surely, 2^90175331 is an apocalyptic number.

90175331 is a deficient number, since it is larger than the sum of its proper divisors (1).

90175331 is an equidigital number, since it uses as much as digits as its factorization.

90175331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 29.

The square root of 90175331 is about 9496.0692394274. The cubic root of 90175331 is about 448.4312966909.

The spelling of 90175331 in words is "ninety million, one hundred seventy-five thousand, three hundred thirty-one".