139381138 has 16 divisors (see below), whose sum is σ = 226779840. Its totient is φ = 63865296.

The previous prime is 139381133. The next prime is 139381141. The reversal of 139381138 is 831183931.

It is a happy number.

139381138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 139381097 and 139381106.

It is not an unprimeable number, because it can be changed into a prime (139381133) 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, 15670 + ... + 22897.

It is an arithmetic number, because the mean of its divisors is an integer number (14173740).

Almost surely, 2^139381138 is an apocalyptic number.

139381138 is a deficient number, since it is larger than the sum of its proper divisors (87398702).

139381138 is a wasteful number, since it uses less digits than its factorization.

139381138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38721.

The product of its digits is 15552, while the sum is 37.

The square root of 139381138 is about 11805.9789090105. The cubic root of 139381138 is about 518.4831759266.

The spelling of 139381138 in words is "one hundred thirty-nine million, three hundred eighty-one thousand, one hundred thirty-eight".