138889167 has 8 divisors (see below), whose sum is σ = 196078896. Its totient is φ = 87146112.

The previous prime is 138889151. The next prime is 138889171. The reversal of 138889167 is 761988831.

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

It is not a de Polignac number, because 138889167 - 2⁴ = 138889151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 2723317 = 138889167 / (1 + 3 + 8 + 8 + 8 + 9 + 1 + 6 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138889117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1361608 + ... + 1361709.

It is an arithmetic number, because the mean of its divisors is an integer number (24509862).

Almost surely, 2^138889167 is an apocalyptic number.

138889167 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

138889167 is a deficient number, since it is larger than the sum of its proper divisors (57189729).

138889167 is a wasteful number, since it uses less digits than its factorization.

138889167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723337.

The product of its digits is 580608, while the sum is 51.

The square root of 138889167 is about 11785.1248190250. The cubic root of 138889167 is about 517.8724299878.

The spelling of 138889167 in words is "one hundred thirty-eight million, eight hundred eighty-nine thousand, one hundred sixty-seven".