138277759 has 2 divisors, whose sum is σ = 138277760. Its totient is φ = 138277758.

The previous prime is 138277717. The next prime is 138277823. The reversal of 138277759 is 957772831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138277759 - 2⁷ = 138277631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138277259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69138879 + 69138880.

It is an arithmetic number, because the mean of its divisors is an integer number (69138880).

Almost surely, 2^138277759 is an apocalyptic number.

138277759 is a deficient number, since it is larger than the sum of its proper divisors (1).

138277759 is an equidigital number, since it uses as much as digits as its factorization.

138277759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 740880, while the sum is 49.

The square root of 138277759 is about 11759.1563898096. The cubic root of 138277759 is about 517.1113984630. Note that the first 3 decimals are identical.

The spelling of 138277759 in words is "one hundred thirty-eight million, two hundred seventy-seven thousand, seven hundred fifty-nine".