138350689 has 2 divisors, whose sum is σ = 138350690. Its totient is φ = 138350688.

The previous prime is 138350669. The next prime is 138350701. The reversal of 138350689 is 986053831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130142464 + 8208225 = 11408^2 + 2865^2 .

It is a cyclic number.

It is not a de Polignac number, because 138350689 - 2¹⁷ = 138219617 is a prime.

It is not a weakly prime, because it can be changed into another prime (138350669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69175344 + 69175345.

It is an arithmetic number, because the mean of its divisors is an integer number (69175345).

Almost surely, 2^138350689 is an apocalyptic number.

It is an amenable number.

138350689 is a deficient number, since it is larger than the sum of its proper divisors (1).

138350689 is an equidigital number, since it uses as much as digits as its factorization.

138350689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 138350689 is about 11762.2569687964. The cubic root of 138350689 is about 517.2022935482.

The spelling of 138350689 in words is "one hundred thirty-eight million, three hundred fifty thousand, six hundred eighty-nine".