199021208 has 16 divisors (see below), whose sum is σ = 389389680. Its totient is φ = 95183968.

The previous prime is 199021189. The next prime is 199021211. The reversal of 199021208 is 802120991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540635 + ... + 541002.

It is an arithmetic number, because the mean of its divisors is an integer number (24336855).

Almost surely, 2^199021208 is an apocalyptic number.

It is an amenable number.

199021208 is a deficient number, since it is larger than the sum of its proper divisors (190368472).

199021208 is a wasteful number, since it uses less digits than its factorization.

199021208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081666 (or 1081662 counting only the distinct ones).

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

The square root of 199021208 is about 14107.4876572691. The cubic root of 199021208 is about 583.8479853920.

The spelling of 199021208 in words is "one hundred ninety-nine million, twenty-one thousand, two hundred eight".