199999902 has 16 divisors (see below), whose sum is σ = 400159872. Its totient is φ = 66639960.

The previous prime is 199999901. The next prime is 199999903. The reversal of 199999902 is 209999991.

It is an interprime number because it is at equal distance from previous prime (199999901) and next prime (199999903).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199999901) 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 in 7 ways as a sum of consecutive naturals, for example, 14983 + ... + 24989.

It is an arithmetic number, because the mean of its divisors is an integer number (25009992).

Almost surely, 2^199999902 is an apocalyptic number.

199999902 is an abundant number, since it is smaller than the sum of its proper divisors (200159970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199999902 is a wasteful number, since it uses less digits than its factorization.

199999902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13343.

The product of its (nonzero) digits is 1062882, while the sum is 57.

The square root of 199999902 is about 14142.1321589073. The cubic root of 199999902 is about 584.8034521246.

The spelling of 199999902 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred two".