138846671 has 2 divisors, whose sum is σ = 138846672. Its totient is φ = 138846670.

The previous prime is 138846649. The next prime is 138846679. The reversal of 138846671 is 176648831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138846671 - 2¹⁴ = 138830287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138846679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69423335 + 69423336.

It is an arithmetic number, because the mean of its divisors is an integer number (69423336).

Almost surely, 2^138846671 is an apocalyptic number.

138846671 is a deficient number, since it is larger than the sum of its proper divisors (1).

138846671 is an equidigital number, since it uses as much as digits as its factorization.

138846671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 44.

The square root of 138846671 is about 11783.3217303102. The cubic root of 138846671 is about 517.8196066894.

The spelling of 138846671 in words is "one hundred thirty-eight million, eight hundred forty-six thousand, six hundred seventy-one".