138716671 has 2 divisors, whose sum is σ = 138716672. Its totient is φ = 138716670.

The previous prime is 138716621. The next prime is 138716687. The reversal of 138716671 is 176617831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138716671 - 2⁹ = 138716159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138716621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69358335 + 69358336.

It is an arithmetic number, because the mean of its divisors is an integer number (69358336).

Almost surely, 2^138716671 is an apocalyptic number.

138716671 is a deficient number, since it is larger than the sum of its proper divisors (1).

138716671 is an equidigital number, since it uses as much as digits as its factorization.

138716671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 138716671 is about 11777.8041671612. The cubic root of 138716671 is about 517.6579473845.

The spelling of 138716671 in words is "one hundred thirty-eight million, seven hundred sixteen thousand, six hundred seventy-one".