90013171 has 2 divisors, whose sum is σ = 90013172. Its totient is φ = 90013170.

The previous prime is 90013169. The next prime is 90013199. The reversal of 90013171 is 17131009.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90013171 - 2¹ = 90013169 is a prime.

Together with 90013169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (90013141) 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, 45006585 + 45006586.

It is an arithmetic number, because the mean of its divisors is an integer number (45006586).

Almost surely, 2^90013171 is an apocalyptic number.

90013171 is a deficient number, since it is larger than the sum of its proper divisors (1).

90013171 is an equidigital number, since it uses as much as digits as its factorization.

90013171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189, while the sum is 22.

The square root of 90013171 is about 9487.5271277610. The cubic root of 90013171 is about 448.1623345457.

The spelling of 90013171 in words is "ninety million, thirteen thousand, one hundred seventy-one".