90998863 has 2 divisors, whose sum is σ = 90998864. Its totient is φ = 90998862.

The previous prime is 90998821. The next prime is 90998881. The reversal of 90998863 is 36889909.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90998863 - 2¹³ = 90990671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90998863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90998813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45499431 + 45499432.

It is an arithmetic number, because the mean of its divisors is an integer number (45499432).

Almost surely, 2^90998863 is an apocalyptic number.

90998863 is a deficient number, since it is larger than the sum of its proper divisors (1).

90998863 is an equidigital number, since it uses as much as digits as its factorization.

90998863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 90998863 is about 9539.3324189903. The cubic root of 90998863 is about 449.7922712013.

The spelling of 90998863 in words is "ninety million, nine hundred ninety-eight thousand, eight hundred sixty-three".