138499759 has 8 divisors (see below), whose sum is σ = 148541040. Its totient is φ = 128733696.

The previous prime is 138499747. The next prime is 138499789. The reversal of 138499759 is 957994831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138499759 - 2⁷ = 138499631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138499789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67762 + ... + 69775.

It is an arithmetic number, because the mean of its divisors is an integer number (18567630).

Almost surely, 2^138499759 is an apocalyptic number.

138499759 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

138499759 is a deficient number, since it is larger than the sum of its proper divisors (10041281).

138499759 is a wasteful number, since it uses less digits than its factorization.

138499759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137609.

The product of its digits is 2449440, while the sum is 55.

The square root of 138499759 is about 11768.5920568265. The cubic root of 138499759 is about 517.3879851219.

The spelling of 138499759 in words is "one hundred thirty-eight million, four hundred ninety-nine thousand, seven hundred fifty-nine".