138772443 has 8 divisors (see below), whose sum is σ = 185136208. Its totient is φ = 92461824.

The previous prime is 138772441. The next prime is 138772507. The reversal of 138772443 is 344277831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138772443 - 2¹ = 138772441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138772441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6730 + ... + 17967.

It is an arithmetic number, because the mean of its divisors is an integer number (23142026).

Almost surely, 2^138772443 is an apocalyptic number.

138772443 is a deficient number, since it is larger than the sum of its proper divisors (46363765).

138772443 is a wasteful number, since it uses less digits than its factorization.

138772443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26573.

The product of its digits is 112896, while the sum is 39.

The square root of 138772443 is about 11780.1716031644. The cubic root of 138772443 is about 517.7273140787.

The spelling of 138772443 in words is "one hundred thirty-eight million, seven hundred seventy-two thousand, four hundred forty-three".