90091163 has 2 divisors, whose sum is σ = 90091164. Its totient is φ = 90091162.

The previous prime is 90091123. The next prime is 90091181. The reversal of 90091163 is 36119009.

It is a strong prime.

It is an emirp because it is prime and its reverse (36119009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90091163 - 2¹⁰ = 90090139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90091123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45045581 + 45045582.

It is an arithmetic number, because the mean of its divisors is an integer number (45045582).

Almost surely, 2^90091163 is an apocalyptic number.

90091163 is a deficient number, since it is larger than the sum of its proper divisors (1).

90091163 is an equidigital number, since it uses as much as digits as its factorization.

90091163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 90091163 is about 9491.6364763933. The cubic root of 90091163 is about 448.2917340777.

The spelling of 90091163 in words is "ninety million, ninety-one thousand, one hundred sixty-three".