138566339 has 8 divisors (see below), whose sum is σ = 142124400. Its totient is φ = 135023616.

The previous prime is 138566333. The next prime is 138566341. The reversal of 138566339 is 933665831.

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 138566339 - 2¹² = 138562243 is a prime.

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 138566339.

It is not an unprimeable number, because it can be changed into a prime (138566333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15719 + ... + 22895.

It is an arithmetic number, because the mean of its divisors is an integer number (17765550).

Almost surely, 2^138566339 is an apocalyptic number.

138566339 is a deficient number, since it is larger than the sum of its proper divisors (3558061).

138566339 is an equidigital number, since it uses as much as digits as its factorization.

138566339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7669.

The product of its digits is 349920, while the sum is 44.

The square root of 138566339 is about 11771.4204325561. The cubic root of 138566339 is about 517.4708785841.

The spelling of 138566339 in words is "one hundred thirty-eight million, five hundred sixty-six thousand, three hundred thirty-nine".