138265447 has 2 divisors, whose sum is σ = 138265448. Its totient is φ = 138265446.

The previous prime is 138265441. The next prime is 138265483. The reversal of 138265447 is 744562831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138265447 - 2⁷ = 138265319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138265441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69132723 + 69132724.

It is an arithmetic number, because the mean of its divisors is an integer number (69132724).

Almost surely, 2^138265447 is an apocalyptic number.

138265447 is a deficient number, since it is larger than the sum of its proper divisors (1).

138265447 is an equidigital number, since it uses as much as digits as its factorization.

138265447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 40.

The square root of 138265447 is about 11758.6328712142. The cubic root of 138265447 is about 517.0960504548.

The spelling of 138265447 in words is "one hundred thirty-eight million, two hundred sixty-five thousand, four hundred forty-seven".