2686139 has 4 divisors (see below), whose sum is σ = 2704080. Its totient is φ = 2668200.

The previous prime is 2686133. The next prime is 2686141. The reversal of 2686139 is 9316862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9316862 = 2 ⋅4658431.

It is a cyclic number.

It is not a de Polignac number, because 2686139 - 2⁸ = 2685883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2686099 and 2686108.

It is not an unprimeable number, because it can be changed into a prime (2686133) 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, 8744 + ... + 9045.

It is an arithmetic number, because the mean of its divisors is an integer number (676020).

2^2686139 is an apocalyptic number.

2686139 is a deficient number, since it is larger than the sum of its proper divisors (17941).

2686139 is a wasteful number, since it uses less digits than its factorization.

2686139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17940.

The product of its digits is 15552, while the sum is 35.

The square root of 2686139 is about 1638.9444774000. The cubic root of 2686139 is about 139.0089706613.

The spelling of 2686139 in words is "two million, six hundred eighty-six thousand, one hundred thirty-nine".