199612899 has 24 divisors (see below), whose sum is σ = 295415120. Its totient is φ = 129843648.

The previous prime is 199612873. The next prime is 199612913. The reversal of 199612899 is 998216991.

199612899 is a `hidden beast` number, since 19 + 9 + 612 + 8 + 9 + 9 = 666.

It is not a de Polignac number, because 199612899 - 2⁸ = 199612643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199611899) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64209 + ... + 67245.

Almost surely, 2^199612899 is an apocalyptic number.

199612899 is a deficient number, since it is larger than the sum of its proper divisors (95802221).

199612899 is a wasteful number, since it uses less digits than its factorization.

199612899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3219 (or 3216 counting only the distinct ones).

The product of its digits is 629856, while the sum is 54.

The square root of 199612899 is about 14128.4429078367. The cubic root of 199612899 is about 584.4260072304.

The spelling of 199612899 in words is "one hundred ninety-nine million, six hundred twelve thousand, eight hundred ninety-nine".