138137836 has 6 divisors (see below), whose sum is σ = 241741220. Its totient is φ = 69068916.

The previous prime is 138137807. The next prime is 138137843. The reversal of 138137836 is 638731831.

138137836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17267226 + ... + 17267233.

Almost surely, 2^138137836 is an apocalyptic number.

It is an amenable number.

138137836 is a deficient number, since it is larger than the sum of its proper divisors (103603384).

138137836 is a wasteful number, since it uses less digits than its factorization.

138137836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34534463 (or 34534461 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 138137836 is about 11753.2053500311. The cubic root of 138137836 is about 516.9369182525.

The spelling of 138137836 in words is "one hundred thirty-eight million, one hundred thirty-seven thousand, eight hundred thirty-six".