90165193 has 2 divisors, whose sum is σ = 90165194. Its totient is φ = 90165192.

The previous prime is 90165181. The next prime is 90165199. The reversal of 90165193 is 39156109.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53538489 + 36626704 = 7317^2 + 6052^2 .

It is a cyclic number.

It is not a de Polignac number, because 90165193 - 2²⁵ = 56610761 is a prime.

It is not a weakly prime, because it can be changed into another prime (90165199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45082596 + 45082597.

It is an arithmetic number, because the mean of its divisors is an integer number (45082597).

Almost surely, 2^90165193 is an apocalyptic number.

It is an amenable number.

90165193 is a deficient number, since it is larger than the sum of its proper divisors (1).

90165193 is an equidigital number, since it uses as much as digits as its factorization.

90165193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 90165193 is about 9495.5354246088. The cubic root of 90165193 is about 448.4144910346.

The spelling of 90165193 in words is "ninety million, one hundred sixty-five thousand, one hundred ninety-three".