99805859 has 2 divisors, whose sum is σ = 99805860. Its totient is φ = 99805858.

The previous prime is 99805843. The next prime is 99805873. The reversal of 99805859 is 95850899.

It is a strong prime.

It is an emirp because it is prime and its reverse (95850899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99805859 - 2⁴ = 99805843 is a prime.

It is a super-2 number, since 2×99805859² = 19922418981455762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99805859.

It is not a weakly prime, because it can be changed into another prime (99805829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49902929 + 49902930.

It is an arithmetic number, because the mean of its divisors is an integer number (49902930).

Almost surely, 2^99805859 is an apocalyptic number.

99805859 is a deficient number, since it is larger than the sum of its proper divisors (1).

99805859 is an equidigital number, since it uses as much as digits as its factorization.

99805859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 53.

The square root of 99805859 is about 9990.2882340801. The cubic root of 99805859 is about 463.8583145356.

The spelling of 99805859 in words is "ninety-nine million, eight hundred five thousand, eight hundred fifty-nine".