99931859 has 2 divisors, whose sum is σ = 99931860. Its totient is φ = 99931858.

The previous prime is 99931841. The next prime is 99931891. The reversal of 99931859 is 95813999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99931859 - 2²⁰ = 98883283 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99931859.

It is not a weakly prime, because it can be changed into another prime (99934859) 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, 49965929 + 49965930.

It is an arithmetic number, because the mean of its divisors is an integer number (49965930).

Almost surely, 2^99931859 is an apocalyptic number.

99931859 is a deficient number, since it is larger than the sum of its proper divisors (1).

99931859 is an equidigital number, since it uses as much as digits as its factorization.

99931859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 787320, while the sum is 53.

The square root of 99931859 is about 9996.5923694027. The cubic root of 99931859 is about 464.0534319042.

The spelling of 99931859 in words is "ninety-nine million, nine hundred thirty-one thousand, eight hundred fifty-nine".