138907099 has 2 divisors, whose sum is σ = 138907100. Its totient is φ = 138907098.

The previous prime is 138907091. The next prime is 138907103. The reversal of 138907099 is 990709831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138907099 - 2³ = 138907091 is a prime.

It is a super-3 number, since 3×138907099³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (138907091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69453549 + 69453550.

It is an arithmetic number, because the mean of its divisors is an integer number (69453550).

Almost surely, 2^138907099 is an apocalyptic number.

138907099 is a deficient number, since it is larger than the sum of its proper divisors (1).

138907099 is an equidigital number, since it uses as much as digits as its factorization.

138907099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 138907099 is about 11785.8855840365. The cubic root of 138907099 is about 517.8947165562.

The spelling of 138907099 in words is "one hundred thirty-eight million, nine hundred seven thousand, ninety-nine".