199999137 has 16 divisors (see below), whose sum is σ = 288064448. Its totient is φ = 122696640.

The previous prime is 199999133. The next prime is 199999183. The reversal of 199999137 is 731999991.

It is not a de Polignac number, because 199999137 - 2² = 199999133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199999133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5163 + ... + 20655.

It is an arithmetic number, because the mean of its divisors is an integer number (18004028).

Almost surely, 2^199999137 is an apocalyptic number.

It is an amenable number.

199999137 is a deficient number, since it is larger than the sum of its proper divisors (88065311).

199999137 is a wasteful number, since it uses less digits than its factorization.

199999137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15840.

The product of its digits is 1240029, while the sum is 57.

The square root of 199999137 is about 14142.1051120404. The cubic root of 199999137 is about 584.8027064989.

The spelling of 199999137 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, one hundred thirty-seven".