138199 has 4 divisors (see below), whose sum is σ = 139536. Its totient is φ = 136864.

The previous prime is 138197. The next prime is 138209. The reversal of 138199 is 991831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138199 - 2¹ = 138197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499 + ... + 724.

It is an arithmetic number, because the mean of its divisors is an integer number (34884).

2¹³⁸¹⁹⁹ is an apocalyptic number.

138199 is a deficient number, since it is larger than the sum of its proper divisors (1337).

138199 is a wasteful number, since it uses less digits than its factorization.

138199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336.

The product of its digits is 1944, while the sum is 31.

The square root of 138199 is about 371.7512609259. The cubic root of 138199 is about 51.7013202600.

The spelling of 138199 in words is "one hundred thirty-eight thousand, one hundred ninety-nine".