138791759 has 2 divisors, whose sum is σ = 138791760. Its totient is φ = 138791758.

The previous prime is 138791753. The next prime is 138791797. The reversal of 138791759 is 957197831.

138791759 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138791759 - 2¹⁶ = 138726223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138791753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69395879 + 69395880.

It is an arithmetic number, because the mean of its divisors is an integer number (69395880).

Almost surely, 2^138791759 is an apocalyptic number.

138791759 is a deficient number, since it is larger than the sum of its proper divisors (1).

138791759 is an equidigital number, since it uses as much as digits as its factorization.

138791759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 50.

The square root of 138791759 is about 11780.9914268707. The cubic root of 138791759 is about 517.7513341138.

The spelling of 138791759 in words is "one hundred thirty-eight million, seven hundred ninety-one thousand, seven hundred fifty-nine".