138568199 has 16 divisors (see below), whose sum is σ = 173031936. Its totient is φ = 107805600.

The previous prime is 138568189. The next prime is 138568201. The reversal of 138568199 is 991865831.

It is a happy number.

It is not a de Polignac number, because 138568199 - 2²⁰ = 137519623 is a prime.

It is a super-2 number, since 2×138568199² = 38402291548207202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138568189) 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, 73529 + ... + 75389.

It is an arithmetic number, because the mean of its divisors is an integer number (10814496).

Almost surely, 2^138568199 is an apocalyptic number.

138568199 is a deficient number, since it is larger than the sum of its proper divisors (34463737).

138568199 is a wasteful number, since it uses less digits than its factorization.

138568199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846.

The product of its digits is 466560, while the sum is 50.

The square root of 138568199 is about 11771.4994372000. The cubic root of 138568199 is about 517.4731939408.

The spelling of 138568199 in words is "one hundred thirty-eight million, five hundred sixty-eight thousand, one hundred ninety-nine".