138199311 has 16 divisors (see below), whose sum is σ = 205229920. Its totient is φ = 91912320.

The previous prime is 138199283. The next prime is 138199351. The reversal of 138199311 is 113991831.

It is not a de Polignac number, because 138199311 - 2⁵ = 138199279 is a prime.

It is a super-4 number, since 4×138199311⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138199351) 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, 5781 + ... + 17601.

It is an arithmetic number, because the mean of its divisors is an integer number (12826870).

Almost surely, 2^138199311 is an apocalyptic number.

138199311 is a deficient number, since it is larger than the sum of its proper divisors (67030609).

138199311 is a wasteful number, since it uses less digits than its factorization.

138199311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12263 (or 12257 counting only the distinct ones).

The product of its digits is 5832, while the sum is 36.

The square root of 138199311 is about 11755.8203031520. The cubic root of 138199311 is about 517.0135904253.

The spelling of 138199311 in words is "one hundred thirty-eight million, one hundred ninety-nine thousand, three hundred eleven".