138543199 has 2 divisors, whose sum is σ = 138543200. Its totient is φ = 138543198.

The previous prime is 138543173. The next prime is 138543211. The reversal of 138543199 is 991345831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138543199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138543299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69271599 + 69271600.

It is an arithmetic number, because the mean of its divisors is an integer number (69271600).

Almost surely, 2^138543199 is an apocalyptic number.

138543199 is a deficient number, since it is larger than the sum of its proper divisors (1).

138543199 is an equidigital number, since it uses as much as digits as its factorization.

138543199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 138543199 is about 11770.4375024890. The cubic root of 138543199 is about 517.4420718218.

The spelling of 138543199 in words is "one hundred thirty-eight million, five hundred forty-three thousand, one hundred ninety-nine".