2689139 has 4 divisors (see below), whose sum is σ = 2713920. Its totient is φ = 2664360.

The previous prime is 2689129. The next prime is 2689151. The reversal of 2689139 is 9319862.

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

It is a cyclic number.

It is not a de Polignac number, because 2689139 - 2⁸ = 2688883 is a prime.

It is a super-2 number, since 2×2689139² = 14462937122642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2689109) 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, 12227 + ... + 12444.

It is an arithmetic number, because the mean of its divisors is an integer number (678480).

2^2689139 is an apocalyptic number.

2689139 is a deficient number, since it is larger than the sum of its proper divisors (24781).

2689139 is a wasteful number, since it uses less digits than its factorization.

2689139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24780.

The product of its digits is 23328, while the sum is 38.

The square root of 2689139 is about 1639.8594451964. The cubic root of 2689139 is about 139.0607018831.

The spelling of 2689139 in words is "two million, six hundred eighty-nine thousand, one hundred thirty-nine".