138085049 has 2 divisors, whose sum is σ = 138085050. Its totient is φ = 138085048.

The previous prime is 138085021. The next prime is 138085061. The reversal of 138085049 is 940580831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86862400 + 51222649 = 9320^2 + 7157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138085049 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138085249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69042524 + 69042525.

It is an arithmetic number, because the mean of its divisors is an integer number (69042525).

Almost surely, 2^138085049 is an apocalyptic number.

It is an amenable number.

138085049 is a deficient number, since it is larger than the sum of its proper divisors (1).

138085049 is an equidigital number, since it uses as much as digits as its factorization.

138085049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 138085049 is about 11750.9594927393. The cubic root of 138085049 is about 516.8710636769.

The spelling of 138085049 in words is "one hundred thirty-eight million, eighty-five thousand, forty-nine".