138427417 has 2 divisors, whose sum is σ = 138427418. Its totient is φ = 138427416.

The previous prime is 138427391. The next prime is 138427433. The reversal of 138427417 is 714724831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138391696 + 35721 = 11764^2 + 189^2 .

It is a cyclic number.

It is not a de Polignac number, because 138427417 - 2¹¹ = 138425369 is a prime.

It is not a weakly prime, because it can be changed into another prime (138427477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69213708 + 69213709.

It is an arithmetic number, because the mean of its divisors is an integer number (69213709).

Almost surely, 2^138427417 is an apocalyptic number.

It is an amenable number.

138427417 is a deficient number, since it is larger than the sum of its proper divisors (1).

138427417 is an equidigital number, since it uses as much as digits as its factorization.

138427417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 37.

The square root of 138427417 is about 11765.5181356369. The cubic root of 138427417 is about 517.2978877324.

The spelling of 138427417 in words is "one hundred thirty-eight million, four hundred twenty-seven thousand, four hundred seventeen".