138680834 has 16 divisors (see below), whose sum is σ = 209547000. Its totient is φ = 68834304.

The previous prime is 138680833. The next prime is 138680837. The reversal of 138680834 is 438086831.

It is a happy number.

138680834 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 118744609 + 19936225 = 10897^2 + 4465^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138680791 and 138680800.

It is not an unprimeable number, because it can be changed into a prime (138680833) 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 7 ways as a sum of consecutive naturals, for example, 308642 + ... + 309090.

Almost surely, 2^138680834 is an apocalyptic number.

138680834 is a deficient number, since it is larger than the sum of its proper divisors (70866166).

138680834 is a wasteful number, since it uses less digits than its factorization.

138680834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 138680834 is about 11776.2826902211. The cubic root of 138680834 is about 517.6133651304.

The spelling of 138680834 in words is "one hundred thirty-eight million, six hundred eighty thousand, eight hundred thirty-four".