138717149 has 2 divisors, whose sum is σ = 138717150. Its totient is φ = 138717148.

The previous prime is 138717101. The next prime is 138717191. The reversal of 138717149 is 941717831.

138717149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133564249 + 5152900 = 11557^2 + 2270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138717149 is a prime.

It is a Chen prime.

It is equal to p_7843667 and since 138717149 and 7843667 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138717199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69358574 + 69358575.

It is an arithmetic number, because the mean of its divisors is an integer number (69358575).

Almost surely, 2^138717149 is an apocalyptic number.

It is an amenable number.

138717149 is a deficient number, since it is larger than the sum of its proper divisors (1).

138717149 is an equidigital number, since it uses as much as digits as its factorization.

138717149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 41.

The square root of 138717149 is about 11777.8244595511. The cubic root of 138717149 is about 517.6585419783.

The spelling of 138717149 in words is "one hundred thirty-eight million, seven hundred seventeen thousand, one hundred forty-nine".