99985663 has 2 divisors, whose sum is σ = 99985664. Its totient is φ = 99985662.

The previous prime is 99985661. The next prime is 99985673. The reversal of 99985663 is 36658999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99985663 - 2¹ = 99985661 is a prime.

Together with 99985661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99985661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49992831 + 49992832.

It is an arithmetic number, because the mean of its divisors is an integer number (49992832).

Almost surely, 2^99985663 is an apocalyptic number.

99985663 is a deficient number, since it is larger than the sum of its proper divisors (1).

99985663 is an equidigital number, since it uses as much as digits as its factorization.

99985663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3149280, while the sum is 55.

The square root of 99985663 is about 9999.2831243045. The cubic root of 99985663 is about 464.1367001481.

The spelling of 99985663 in words is "ninety-nine million, nine hundred eighty-five thousand, six hundred sixty-three".