90288161 has 2 divisors, whose sum is σ = 90288162. Its totient is φ = 90288160.

The previous prime is 90288127. The next prime is 90288167. The reversal of 90288161 is 16188209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89397025 + 891136 = 9455^2 + 944^2 .

It is a cyclic number.

It is not a de Polignac number, because 90288161 - 2¹⁴ = 90271777 is a prime.

It is not a weakly prime, because it can be changed into another prime (90288167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45144080 + 45144081.

It is an arithmetic number, because the mean of its divisors is an integer number (45144081).

Almost surely, 2^90288161 is an apocalyptic number.

It is an amenable number.

90288161 is a deficient number, since it is larger than the sum of its proper divisors (1).

90288161 is an equidigital number, since it uses as much as digits as its factorization.

90288161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 90288161 is about 9502.0082614151. The cubic root of 90288161 is about 448.6182488381.

The spelling of 90288161 in words is "ninety million, two hundred eighty-eight thousand, one hundred sixty-one".