138607507 has 2 divisors, whose sum is σ = 138607508. Its totient is φ = 138607506.

The previous prime is 138607493. The next prime is 138607519. The reversal of 138607507 is 705706831.

138607507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138607507 - 2⁷ = 138607379 is a prime.

It is not a weakly prime, because it can be changed into another prime (138607537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69303753 + 69303754.

It is an arithmetic number, because the mean of its divisors is an integer number (69303754).

Almost surely, 2^138607507 is an apocalyptic number.

138607507 is a deficient number, since it is larger than the sum of its proper divisors (1).

138607507 is an equidigital number, since it uses as much as digits as its factorization.

138607507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 138607507 is about 11773.1689446810. The cubic root of 138607507 is about 517.5221203019.

The spelling of 138607507 in words is "one hundred thirty-eight million, six hundred seven thousand, five hundred seven".