138575117 has 2 divisors, whose sum is σ = 138575118. Its totient is φ = 138575116.

The previous prime is 138575093. The next prime is 138575149. The reversal of 138575117 is 711575831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129640996 + 8934121 = 11386^2 + 2989^2 .

It is a cyclic number.

It is not a de Polignac number, because 138575117 - 2¹⁸ = 138312973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138575167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69287558 + 69287559.

It is an arithmetic number, because the mean of its divisors is an integer number (69287559).

Almost surely, 2^138575117 is an apocalyptic number.

It is an amenable number.

138575117 is a deficient number, since it is larger than the sum of its proper divisors (1).

138575117 is an equidigital number, since it uses as much as digits as its factorization.

138575117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29400, while the sum is 38.

The square root of 138575117 is about 11771.7932788509. The cubic root of 138575117 is about 517.4818053923.

The spelling of 138575117 in words is "one hundred thirty-eight million, five hundred seventy-five thousand, one hundred seventeen".