138914185 has 8 divisors (see below), whose sum is σ = 168416136. Its totient is φ = 109985280.

The previous prime is 138914179. The next prime is 138914201. The reversal of 138914185 is 581419831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 52591504 + 86322681 = 7252^2 + 9291^2 .

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

It is not a de Polignac number, because 138914185 - 2¹⁵ = 138881417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142726 + ... + 143695.

It is an arithmetic number, because the mean of its divisors is an integer number (21052017).

Almost surely, 2^138914185 is an apocalyptic number.

It is an amenable number.

138914185 is a deficient number, since it is larger than the sum of its proper divisors (29501951).

138914185 is an equidigital number, since it uses as much as digits as its factorization.

138914185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286523.

The product of its digits is 34560, while the sum is 40.

The square root of 138914185 is about 11786.1861940154. The cubic root of 138914185 is about 517.9035227766.

It can be divided in two parts, 13 and 8914185, that added together give a palindrome (8914198).

The spelling of 138914185 in words is "one hundred thirty-eight million, nine hundred fourteen thousand, one hundred eighty-five".