199999149 has 32 divisors (see below), whose sum is σ = 328289280. Its totient is φ = 105743232.

The previous prime is 199999133. The next prime is 199999183. The reversal of 199999149 is 941999991.

It is not a de Polignac number, because 199999149 - 2⁴ = 199999133 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 199999092 and 199999101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199999649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11329 + ... + 22985.

It is an arithmetic number, because the mean of its divisors is an integer number (10259040).

Almost surely, 2^199999149 is an apocalyptic number.

199999149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

199999149 is a deficient number, since it is larger than the sum of its proper divisors (128290131).

199999149 is a wasteful number, since it uses less digits than its factorization.

199999149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11729.

The product of its digits is 2125764, while the sum is 60.

The square root of 199999149 is about 14142.1055363054. The cubic root of 199999149 is about 584.8027181950.

The spelling of 199999149 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, one hundred forty-nine".