138055417 has 2 divisors, whose sum is σ = 138055418. Its totient is φ = 138055416.

The previous prime is 138055391. The next prime is 138055427. The reversal of 138055417 is 714550831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114832656 + 23222761 = 10716^2 + 4819^2 .

It is an emirp because it is prime and its reverse (714550831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138055417 - 2⁷ = 138055289 is a prime.

It is not a weakly prime, because it can be changed into another prime (138055427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69027708 + 69027709.

It is an arithmetic number, because the mean of its divisors is an integer number (69027709).

Almost surely, 2^138055417 is an apocalyptic number.

It is an amenable number.

138055417 is a deficient number, since it is larger than the sum of its proper divisors (1).

138055417 is an equidigital number, since it uses as much as digits as its factorization.

138055417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 138055417 is about 11749.6985918789. The cubic root of 138055417 is about 516.8340888339.

The spelling of 138055417 in words is "one hundred thirty-eight million, fifty-five thousand, four hundred seventeen".