138807307 has 2 divisors, whose sum is σ = 138807308. Its totient is φ = 138807306.

The previous prime is 138807301. The next prime is 138807349. The reversal of 138807307 is 703708831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138807307 - 2³ = 138807299 is a prime.

It is not a weakly prime, because it can be changed into another prime (138807301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69403653 + 69403654.

It is an arithmetic number, because the mean of its divisors is an integer number (69403654).

Almost surely, 2^138807307 is an apocalyptic number.

138807307 is a deficient number, since it is larger than the sum of its proper divisors (1).

138807307 is an equidigital number, since it uses as much as digits as its factorization.

138807307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 138807307 is about 11781.6512849430. The cubic root of 138807307 is about 517.7706669071.

The spelling of 138807307 in words is "one hundred thirty-eight million, eight hundred seven thousand, three hundred seven".