2609849 has 6 divisors (see below), whose sum is σ = 2868810. Its totient is φ = 2372480.

The previous prime is 2609813. The next prime is 2609899. The reversal of 2609849 is 9489062.

It can be written as a sum of positive squares in only one way, i.e., 1517824 + 1092025 = 1232^2 + 1045^2 .

It is not a de Polignac number, because 2609849 - 2¹² = 2605753 is a prime.

It is a super-2 number, since 2×2609849² = 13622623605602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2609809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10664 + ... + 10905.

It is an arithmetic number, because the mean of its divisors is an integer number (478135).

2^2609849 is an apocalyptic number.

It is an amenable number.

2609849 is a deficient number, since it is larger than the sum of its proper divisors (258961).

2609849 is a wasteful number, since it uses less digits than its factorization.

2609849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21591 (or 21580 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 2609849 is about 1615.5027081376. The cubic root of 2609849 is about 137.6802968159.

The spelling of 2609849 in words is "two million, six hundred nine thousand, eight hundred forty-nine".