138432851 has 8 divisors (see below), whose sum is σ = 144136608. Its totient is φ = 132840000.

The previous prime is 138432839. The next prime is 138432901. The reversal of 138432851 is 158234831.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-138432851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138432451) 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, 25175 + ... + 30176.

It is an arithmetic number, because the mean of its divisors is an integer number (18017076).

Almost surely, 2^138432851 is an apocalyptic number.

138432851 is a deficient number, since it is larger than the sum of its proper divisors (5703757).

138432851 is an equidigital number, since it uses as much as digits as its factorization.

138432851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55453.

The product of its digits is 23040, while the sum is 35.

The square root of 138432851 is about 11765.7490624269. The cubic root of 138432851 is about 517.3046565262.

The spelling of 138432851 in words is "one hundred thirty-eight million, four hundred thirty-two thousand, eight hundred fifty-one".