138794759 has 4 divisors (see below), whose sum is σ = 138823704. Its totient is φ = 138765816.

The previous prime is 138794743. The next prime is 138794779. The reversal of 138794759 is 957497831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138794759 - 2⁴ = 138794743 is a prime.

It is a super-3 number, since 3×138794759³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138794759.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138794779) 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 3 ways as a sum of consecutive naturals, for example, 5372 + ... + 17505.

It is an arithmetic number, because the mean of its divisors is an integer number (34705926).

Almost surely, 2^138794759 is an apocalyptic number.

138794759 is a deficient number, since it is larger than the sum of its proper divisors (28945).

138794759 is an equidigital number, since it uses as much as digits as its factorization.

138794759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28944.

The product of its digits is 1905120, while the sum is 53.

The square root of 138794759 is about 11781.1187499320. The cubic root of 138794759 is about 517.7550645053.

The spelling of 138794759 in words is "one hundred thirty-eight million, seven hundred ninety-four thousand, seven hundred fifty-nine".