138780559 has 2 divisors, whose sum is σ = 138780560. Its totient is φ = 138780558.

The previous prime is 138780539. The next prime is 138780671. The reversal of 138780559 is 955087831.

It is a weak prime.

It is an emirp because it is prime and its reverse (955087831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138780559 - 2⁵ = 138780527 is a prime.

It is a super-3 number, since 3×138780559³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138780539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69390279 + 69390280.

It is an arithmetic number, because the mean of its divisors is an integer number (69390280).

Almost surely, 2^138780559 is an apocalyptic number.

138780559 is a deficient number, since it is larger than the sum of its proper divisors (1).

138780559 is an equidigital number, since it uses as much as digits as its factorization.

138780559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 46.

The square root of 138780559 is about 11780.5160752830. The cubic root of 138780559 is about 517.7374068437.

The spelling of 138780559 in words is "one hundred thirty-eight million, seven hundred eighty thousand, five hundred fifty-nine".