138068985 has 16 divisors (see below), whose sum is σ = 233905536. Its totient is φ = 69305088.

The previous prime is 138068969. The next prime is 138069013. The reversal of 138068985 is 589860831.

It is not a de Polignac number, because 138068985 - 2⁴ = 138068969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270469 + ... + 270978.

It is an arithmetic number, because the mean of its divisors is an integer number (14619096).

Almost surely, 2^138068985 is an apocalyptic number.

138068985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138068985 is a deficient number, since it is larger than the sum of its proper divisors (95836551).

138068985 is a wasteful number, since it uses less digits than its factorization.

138068985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541472.

The product of its (nonzero) digits is 414720, while the sum is 48.

The square root of 138068985 is about 11750.2759542064. The cubic root of 138068985 is about 516.8510196562.

It can be divided in two parts, 13806 and 8985, that added together give a triangular number (22791 = T₂₁₃).

The spelling of 138068985 in words is "one hundred thirty-eight million, sixty-eight thousand, nine hundred eighty-five".