90198763 has 2 divisors, whose sum is σ = 90198764. Its totient is φ = 90198762.

The previous prime is 90198737. The next prime is 90198767. The reversal of 90198763 is 36789109.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90198763 is a prime.

It is not a weakly prime, because it can be changed into another prime (90198767) 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, 45099381 + 45099382.

It is an arithmetic number, because the mean of its divisors is an integer number (45099382).

Almost surely, 2^90198763 is an apocalyptic number.

90198763 is a deficient number, since it is larger than the sum of its proper divisors (1).

90198763 is an equidigital number, since it uses as much as digits as its factorization.

90198763 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 90198763 is about 9497.3029329384. The cubic root of 90198763 is about 448.4701348521.

The spelling of 90198763 in words is "ninety million, one hundred ninety-eight thousand, seven hundred sixty-three".