138271297 has 2 divisors, whose sum is σ = 138271298. Its totient is φ = 138271296.

The previous prime is 138271267. The next prime is 138271327. The reversal of 138271297 is 792172831.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (138271267) and next prime (138271327).

It can be written as a sum of positive squares in only one way, i.e., 97298496 + 40972801 = 9864^2 + 6401^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138271297 is a prime.

It is not a weakly prime, because it can be changed into another prime (138271247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69135648 + 69135649.

It is an arithmetic number, because the mean of its divisors is an integer number (69135649).

Almost surely, 2^138271297 is an apocalyptic number.

It is an amenable number.

138271297 is a deficient number, since it is larger than the sum of its proper divisors (1).

138271297 is an equidigital number, since it uses as much as digits as its factorization.

138271297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 138271297 is about 11758.8816219911. The cubic root of 138271297 is about 517.1033431162.

The spelling of 138271297 in words is "one hundred thirty-eight million, two hundred seventy-one thousand, two hundred ninety-seven".