90194171 has 2 divisors, whose sum is σ = 90194172. Its totient is φ = 90194170.

The previous prime is 90194161. The next prime is 90194207. The reversal of 90194171 is 17149109.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (17149109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90194171 - 2⁶ = 90194107 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90194101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45097085 + 45097086.

It is an arithmetic number, because the mean of its divisors is an integer number (45097086).

Almost surely, 2^90194171 is an apocalyptic number.

90194171 is a deficient number, since it is larger than the sum of its proper divisors (1).

90194171 is an equidigital number, since it uses as much as digits as its factorization.

90194171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 90194171 is about 9497.0611770168. The cubic root of 90194171 is about 448.4625242163.

The spelling of 90194171 in words is "ninety million, one hundred ninety-four thousand, one hundred seventy-one".