138329369 has 4 divisors (see below), whose sum is σ = 138393444. Its totient is φ = 138265296.

The previous prime is 138329351. The next prime is 138329381. The reversal of 138329369 is 963923831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 79423744 + 58905625 = 8912^2 + 7675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138329369 is a prime.

It is a super-2 number, since 2×138329369² = 38270028655876322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138323369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28682 + ... + 33155.

It is an arithmetic number, because the mean of its divisors is an integer number (34598361).

Almost surely, 2^138329369 is an apocalyptic number.

It is an amenable number.

138329369 is a deficient number, since it is larger than the sum of its proper divisors (64075).

138329369 is an equidigital number, since it uses as much as digits as its factorization.

138329369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64074.

The product of its digits is 209952, while the sum is 44.

The square root of 138329369 is about 11761.3506452278. The cubic root of 138329369 is about 517.1757250277.

The spelling of 138329369 in words is "one hundred thirty-eight million, three hundred twenty-nine thousand, three hundred sixty-nine".