138037747 has 4 divisors (see below), whose sum is σ = 138073176. Its totient is φ = 138002320.

The previous prime is 138037733. The next prime is 138037751. The reversal of 138037747 is 747730831.

138037747 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 747730831 = 113 ⋅6617087.

It is a cyclic number.

It is not a de Polignac number, because 138037747 - 2²³ = 129649139 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138037247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11029 + ... + 19942.

It is an arithmetic number, because the mean of its divisors is an integer number (34518294).

Almost surely, 2^138037747 is an apocalyptic number.

138037747 is a deficient number, since it is larger than the sum of its proper divisors (35429).

138037747 is an equidigital number, since it uses as much as digits as its factorization.

138037747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35428.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 138037747 is about 11748.9466336349. The cubic root of 138037747 is about 516.8120376697.

The spelling of 138037747 in words is "one hundred thirty-eight million, thirty-seven thousand, seven hundred forty-seven".