199109212 has 6 divisors (see below), whose sum is σ = 348441128. Its totient is φ = 99554604.

The previous prime is 199109201. The next prime is 199109233. The reversal of 199109212 is 212901991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24888648 + ... + 24888655.

Almost surely, 2^199109212 is an apocalyptic number.

It is an amenable number.

199109212 is a deficient number, since it is larger than the sum of its proper divisors (149331916).

199109212 is a wasteful number, since it uses less digits than its factorization.

199109212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49777307 (or 49777305 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 199109212 is about 14110.6063654260. The cubic root of 199109212 is about 583.9340287961.

The spelling of 199109212 in words is "one hundred ninety-nine million, one hundred nine thousand, two hundred twelve".