8138739 has 16 divisors (see below), whose sum is σ = 12691712. Its totient is φ = 4542048.

The previous prime is 8138737. The next prime is 8138743. The reversal of 8138739 is 9378318.

8138739 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8138739 - 2¹ = 8138737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8138697 and 8138706.

It is not an unprimeable number, because it can be changed into a prime (8138737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3604 + ... + 5409.

It is an arithmetic number, because the mean of its divisors is an integer number (793232).

Almost surely, 2^8138739 is an apocalyptic number.

8138739 is a deficient number, since it is larger than the sum of its proper divisors (4552973).

8138739 is a wasteful number, since it uses less digits than its factorization.

8138739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9066.

The product of its digits is 36288, while the sum is 39.

The square root of 8138739 is about 2852.8475248425. The cubic root of 8138739 is about 201.1495384810.

The spelling of 8138739 in words is "eight million, one hundred thirty-eight thousand, seven hundred thirty-nine".