199021902 has 8 divisors (see below), whose sum is σ = 398043816. Its totient is φ = 66340632.

The previous prime is 199021883. The next prime is 199021919. The reversal of 199021902 is 209120991.

It is a sphenic number, since it is the product of 3 distinct primes.

199021902 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 16585153 + ... + 16585164.

It is an arithmetic number, because the mean of its divisors is an integer number (49755477).

Almost surely, 2^199021902 is an apocalyptic number.

199021902 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

199021902 is a wasteful number, since it uses less digits than its factorization.

199021902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33170322.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 199021902 is about 14107.5122541148. The cubic root of 199021902 is about 583.8486640299.

The spelling of 199021902 in words is "one hundred ninety-nine million, twenty-one thousand, nine hundred two".