138127799 has 2 divisors, whose sum is σ = 138127800. Its totient is φ = 138127798.

The previous prime is 138127789. The next prime is 138127807. The reversal of 138127799 is 997721831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138127799 - 2⁸ = 138127543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138127789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69063899 + 69063900.

It is an arithmetic number, because the mean of its divisors is an integer number (69063900).

Almost surely, 2^138127799 is an apocalyptic number.

138127799 is a deficient number, since it is larger than the sum of its proper divisors (1).

138127799 is an equidigital number, since it uses as much as digits as its factorization.

138127799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 47.

The square root of 138127799 is about 11752.7783523727. The cubic root of 138127799 is about 516.9243978558.

The spelling of 138127799 in words is "one hundred thirty-eight million, one hundred twenty-seven thousand, seven hundred ninety-nine".