199820102 has 4 divisors (see below), whose sum is σ = 299730156. Its totient is φ = 99910050.

The previous prime is 199820081. The next prime is 199820111. The reversal of 199820102 is 201028991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201028991 = 10993 ⋅18287.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49955024 + ... + 49955027.

It is an arithmetic number, because the mean of its divisors is an integer number (74932539).

Almost surely, 2^199820102 is an apocalyptic number.

199820102 is a deficient number, since it is larger than the sum of its proper divisors (99910054).

199820102 is an equidigital number, since it uses as much as digits as its factorization.

199820102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99910053.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 199820102 is about 14135.7738380324. The cubic root of 199820102 is about 584.6281533959.

The spelling of 199820102 in words is "one hundred ninety-nine million, eight hundred twenty thousand, one hundred two".