99618859 has 2 divisors, whose sum is σ = 99618860. Its totient is φ = 99618858.

The previous prime is 99618851. The next prime is 99618887. The reversal of 99618859 is 95881699.

It is a weak prime.

It is an emirp because it is prime and its reverse (95881699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99618859 - 2³ = 99618851 is a prime.

It is not a weakly prime, because it can be changed into another prime (99618851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49809429 + 49809430.

It is an arithmetic number, because the mean of its divisors is an integer number (49809430).

Almost surely, 2^99618859 is an apocalyptic number.

99618859 is a deficient number, since it is larger than the sum of its proper divisors (1).

99618859 is an equidigital number, since it uses as much as digits as its factorization.

99618859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 55.

The square root of 99618859 is about 9980.9247567548. The cubic root of 99618859 is about 463.5684326382.

The spelling of 99618859 in words is "ninety-nine million, six hundred eighteen thousand, eight hundred fifty-nine".