138371263 has 2 divisors, whose sum is σ = 138371264. Its totient is φ = 138371262.

The previous prime is 138371251. The next prime is 138371293. The reversal of 138371263 is 362173831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138371263 - 2⁹ = 138370751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138371293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69185631 + 69185632.

It is an arithmetic number, because the mean of its divisors is an integer number (69185632).

Almost surely, 2^138371263 is an apocalyptic number.

138371263 is a deficient number, since it is larger than the sum of its proper divisors (1).

138371263 is an equidigital number, since it uses as much as digits as its factorization.

138371263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The square root of 138371263 is about 11763.1315133344. The cubic root of 138371263 is about 517.2279298320.

The spelling of 138371263 in words is "one hundred thirty-eight million, three hundred seventy-one thousand, two hundred sixty-three".