138013738 has 4 divisors (see below), whose sum is σ = 207020610. Its totient is φ = 69006868.

The previous prime is 138013709. The next prime is 138013747. The reversal of 138013738 is 837310831.

138013738 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 132411049 + 5602689 = 11507^2 + 2367^2 .

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, 34503433 + ... + 34503436.

Almost surely, 2^138013738 is an apocalyptic number.

138013738 is a deficient number, since it is larger than the sum of its proper divisors (69006872).

138013738 is an equidigital number, since it uses as much as digits as its factorization.

138013738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69006871.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 138013738 is about 11747.9248380299. The cubic root of 138013738 is about 516.7820727749.

The spelling of 138013738 in words is "one hundred thirty-eight million, thirteen thousand, seven hundred thirty-eight".