138867443 has 16 divisors (see below), whose sum is σ = 163489536. Its totient is φ = 116286240.

The previous prime is 138867433. The next prime is 138867497. The reversal of 138867443 is 344768831.

It is a cyclic number.

It is not a de Polignac number, because 138867443 - 2¹⁴ = 138851059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138867394 and 138867403.

It is not an unprimeable number, because it can be changed into a prime (138867433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105596 + ... + 106902.

It is an arithmetic number, because the mean of its divisors is an integer number (10218096).

Almost surely, 2^138867443 is an apocalyptic number.

138867443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

138867443 is a deficient number, since it is larger than the sum of its proper divisors (24622093).

138867443 is a wasteful number, since it uses less digits than its factorization.

138867443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074.

The product of its digits is 387072, while the sum is 44.

The square root of 138867443 is about 11784.2031126419. The cubic root of 138867443 is about 517.8454280084.

The spelling of 138867443 in words is "one hundred thirty-eight million, eight hundred sixty-seven thousand, four hundred forty-three".