138607207 has 2 divisors, whose sum is σ = 138607208. Its totient is φ = 138607206.

The previous prime is 138607201. The next prime is 138607241. The reversal of 138607207 is 702706831.

138607207 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (138607241) can be obtained adding 138607207 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138607207 - 2²⁷ = 4389479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138607201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69303603 + 69303604.

It is an arithmetic number, because the mean of its divisors is an integer number (69303604).

Almost surely, 2^138607207 is an apocalyptic number.

138607207 is a deficient number, since it is larger than the sum of its proper divisors (1).

138607207 is an equidigital number, since it uses as much as digits as its factorization.

138607207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 138607207 is about 11773.1562038393. The cubic root of 138607207 is about 517.5217469293.

The spelling of 138607207 in words is "one hundred thirty-eight million, six hundred seven thousand, two hundred seven".