138372289 has 8 divisors (see below), whose sum is σ = 151102368. Its totient is φ = 125667360.

The previous prime is 138372257. The next prime is 138372317. The reversal of 138372289 is 982273831.

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 138372289 - 2⁵ = 138372257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138372239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6334 + ... + 17800.

It is an arithmetic number, because the mean of its divisors is an integer number (18887796).

Almost surely, 2^138372289 is an apocalyptic number.

It is an amenable number.

138372289 is a deficient number, since it is larger than the sum of its proper divisors (12730079).

138372289 is a wasteful number, since it uses less digits than its factorization.

138372289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12575.

The product of its digits is 145152, while the sum is 43.

The square root of 138372289 is about 11763.1751240896. The cubic root of 138372289 is about 517.2292082153.

The spelling of 138372289 in words is "one hundred thirty-eight million, three hundred seventy-two thousand, two hundred eighty-nine".