138659707 has 2 divisors, whose sum is σ = 138659708. Its totient is φ = 138659706.

The previous prime is 138659693. The next prime is 138659711. The reversal of 138659707 is 707956831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138659707 - 2⁷ = 138659579 is a prime.

It is not a weakly prime, because it can be changed into another prime (138659737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69329853 + 69329854.

It is an arithmetic number, because the mean of its divisors is an integer number (69329854).

Almost surely, 2^138659707 is an apocalyptic number.

138659707 is a deficient number, since it is larger than the sum of its proper divisors (1).

138659707 is an equidigital number, since it uses as much as digits as its factorization.

138659707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 138659707 is about 11775.3856412433. The cubic root of 138659707 is about 517.5870789388.

The spelling of 138659707 in words is "one hundred thirty-eight million, six hundred fifty-nine thousand, seven hundred seven".