138862271 has 2 divisors, whose sum is σ = 138862272. Its totient is φ = 138862270.

The previous prime is 138862259. The next prime is 138862289. The reversal of 138862271 is 172268831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138862271 - 2¹⁴ = 138845887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138862211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69431135 + 69431136.

It is an arithmetic number, because the mean of its divisors is an integer number (69431136).

Almost surely, 2^138862271 is an apocalyptic number.

138862271 is a deficient number, since it is larger than the sum of its proper divisors (1).

138862271 is an equidigital number, since it uses as much as digits as its factorization.

138862271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The square root of 138862271 is about 11783.9836642792. The cubic root of 138862271 is about 517.8389990241.

The spelling of 138862271 in words is "one hundred thirty-eight million, eight hundred sixty-two thousand, two hundred seventy-one".