138247199 has 2 divisors, whose sum is σ = 138247200. Its totient is φ = 138247198.

The previous prime is 138247189. The next prime is 138247237. The reversal of 138247199 is 991742831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138247199 - 2⁴ = 138247183 is a prime.

It is a super-2 number, since 2×138247199² = 38224576062691202, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138247159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69123599 + 69123600.

It is an arithmetic number, because the mean of its divisors is an integer number (69123600).

Almost surely, 2^138247199 is an apocalyptic number.

138247199 is a deficient number, since it is larger than the sum of its proper divisors (1).

138247199 is an equidigital number, since it uses as much as digits as its factorization.

138247199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 44.

The square root of 138247199 is about 11757.8569050657. The cubic root of 138247199 is about 517.0733010163.

The spelling of 138247199 in words is "one hundred thirty-eight million, two hundred forty-seven thousand, one hundred ninety-nine".