139918144 has 14 divisors (see below), whose sum is σ = 277650194. Its totient is φ = 69959040.

The previous prime is 139918139. The next prime is 139918157. The reversal of 139918144 is 441819931.

It can be written as a sum of positive squares in only one way, i.e., 122943744 + 16974400 = 11088^2 + 4120^2 .

It is a junction number, because it is equal to n+sod(n) for n = 139918097 and 139918106.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1093047 + ... + 1093174.

Almost surely, 2^139918144 is an apocalyptic number.

It is an amenable number.

139918144 is a deficient number, since it is larger than the sum of its proper divisors (137732050).

139918144 is an equidigital number, since it uses as much as digits as its factorization.

139918144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186233 (or 2186223 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The square root of 139918144 is about 11828.7000131037. The cubic root of 139918144 is about 519.1481912180.

The spelling of 139918144 in words is "one hundred thirty-nine million, nine hundred eighteen thousand, one hundred forty-four".