2609839 has 4 divisors (see below), whose sum is σ = 2624440. Its totient is φ = 2595240.

The previous prime is 2609813. The next prime is 2609899. The reversal of 2609839 is 9389062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9389062 = 2 ⋅4694531.

It is a cyclic number.

It is not a de Polignac number, because 2609839 - 2¹¹ = 2607791 is a prime.

It is a super-2 number, since 2×2609839² = 13622519211842, which contains 22 as substring.

It is a Duffinian number.

2609839 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2609798 and 2609807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2609809) 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, 7029 + ... + 7390.

It is an arithmetic number, because the mean of its divisors is an integer number (656110).

2^2609839 is an apocalyptic number.

2609839 is a deficient number, since it is larger than the sum of its proper divisors (14601).

2609839 is a wasteful number, since it uses less digits than its factorization.

2609839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14600.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 2609839 is about 1615.4996131228. The cubic root of 2609839 is about 137.6801209686.

The spelling of 2609839 in words is "two million, six hundred nine thousand, eight hundred thirty-nine".