90690263 has 2 divisors, whose sum is σ = 90690264. Its totient is φ = 90690262.

The previous prime is 90690251. The next prime is 90690277. The reversal of 90690263 is 36209609.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90690263 - 2¹⁰ = 90689239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90690203) 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, 45345131 + 45345132.

It is an arithmetic number, because the mean of its divisors is an integer number (45345132).

Almost surely, 2^90690263 is an apocalyptic number.

90690263 is a deficient number, since it is larger than the sum of its proper divisors (1).

90690263 is an equidigital number, since it uses as much as digits as its factorization.

90690263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 90690263 is about 9523.1435461196. The cubic root of 90690263 is about 449.2832424979.

The spelling of 90690263 in words is "ninety million, six hundred ninety thousand, two hundred sixty-three".