138481713 has 12 divisors (see below), whose sum is σ = 205435828. Its totient is φ = 89825760.

The previous prime is 138481691. The next prime is 138481727. The reversal of 138481713 is 317184831.

It can be written as a sum of positive squares in 2 ways, for example, as 109998144 + 28483569 = 10488^2 + 5337^2 .

It is not a de Polignac number, because 138481713 - 2¹² = 138477617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138481753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207598 + ... + 208263.

Almost surely, 2^138481713 is an apocalyptic number.

It is an amenable number.

138481713 is a deficient number, since it is larger than the sum of its proper divisors (66954115).

138481713 is a wasteful number, since it uses less digits than its factorization.

138481713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415904 (or 415901 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 138481713 is about 11767.8253301109. The cubic root of 138481713 is about 517.3655129068.

The spelling of 138481713 in words is "one hundred thirty-eight million, four hundred eighty-one thousand, seven hundred thirteen".