102399859 has 2 divisors, whose sum is σ = 102399860. Its totient is φ = 102399858.

The previous prime is 102399827. The next prime is 102399877. The reversal of 102399859 is 958993201.

It is a strong prime.

It is an emirp because it is prime and its reverse (958993201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102399859 - 2⁵ = 102399827 is a prime.

It is a super-2 number, since 2×102399859² = 20971462246439762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102399259) 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, 51199929 + 51199930.

It is an arithmetic number, because the mean of its divisors is an integer number (51199930).

Almost surely, 2^102399859 is an apocalyptic number.

102399859 is a deficient number, since it is larger than the sum of its proper divisors (1).

102399859 is an equidigital number, since it uses as much as digits as its factorization.

102399859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 102399859 is about 10119.2815456434. The cubic root of 102399859 is about 467.8426233814.

The spelling of 102399859 in words is "one hundred two million, three hundred ninety-nine thousand, eight hundred fifty-nine".