138907127 has 2 divisors, whose sum is σ = 138907128. Its totient is φ = 138907126.

The previous prime is 138907123. The next prime is 138907141. The reversal of 138907127 is 721709831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138907127 - 2² = 138907123 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138907121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69453563 + 69453564.

It is an arithmetic number, because the mean of its divisors is an integer number (69453564).

Almost surely, 2^138907127 is an apocalyptic number.

138907127 is a deficient number, since it is larger than the sum of its proper divisors (1).

138907127 is an equidigital number, since it uses as much as digits as its factorization.

138907127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 138907127 is about 11785.8867718980. The cubic root of 138907127 is about 517.8947513542.

The spelling of 138907127 in words is "one hundred thirty-eight million, nine hundred seven thousand, one hundred twenty-seven".