138275047 has 2 divisors, whose sum is σ = 138275048. Its totient is φ = 138275046.

The previous prime is 138275021. The next prime is 138275063. The reversal of 138275047 is 740572831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138275047 - 2²³ = 129886439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138274997 and 138275015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138275017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69137523 + 69137524.

It is an arithmetic number, because the mean of its divisors is an integer number (69137524).

Almost surely, 2^138275047 is an apocalyptic number.

138275047 is a deficient number, since it is larger than the sum of its proper divisors (1).

138275047 is an equidigital number, since it uses as much as digits as its factorization.

138275047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 138275047 is about 11759.0410748496. The cubic root of 138275047 is about 517.1080177909.

The spelling of 138275047 in words is "one hundred thirty-eight million, two hundred seventy-five thousand, forty-seven".