90308263 has 2 divisors, whose sum is σ = 90308264. Its totient is φ = 90308262.

The previous prime is 90308221. The next prime is 90308279. The reversal of 90308263 is 36280309.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90308263 - 2⁹ = 90307751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90308293) 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, 45154131 + 45154132.

It is an arithmetic number, because the mean of its divisors is an integer number (45154132).

Almost surely, 2^90308263 is an apocalyptic number.

90308263 is a deficient number, since it is larger than the sum of its proper divisors (1).

90308263 is an equidigital number, since it uses as much as digits as its factorization.

90308263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 90308263 is about 9503.0659789354. The cubic root of 90308263 is about 448.6515402270.

The spelling of 90308263 in words is "ninety million, three hundred eight thousand, two hundred sixty-three".