138277147 has 2 divisors, whose sum is σ = 138277148. Its totient is φ = 138277146.

The previous prime is 138277141. The next prime is 138277189. The reversal of 138277147 is 741772831.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138277147 is a prime.

It is not a weakly prime, because it can be changed into another prime (138277141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69138573 + 69138574.

It is an arithmetic number, because the mean of its divisors is an integer number (69138574).

Almost surely, 2^138277147 is an apocalyptic number.

138277147 is a deficient number, since it is larger than the sum of its proper divisors (1).

138277147 is an equidigital number, since it uses as much as digits as its factorization.

138277147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65856, while the sum is 40.

The square root of 138277147 is about 11759.1303675059. The cubic root of 138277147 is about 517.1106355718.

The spelling of 138277147 in words is "one hundred thirty-eight million, two hundred seventy-seven thousand, one hundred forty-seven".