2684869 has 6 divisors (see below), whose sum is σ = 2951270. Its totient is φ = 2440680.

The previous prime is 2684837. The next prime is 2684881. The reversal of 2684869 is 9684862.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2439844 + 245025 = 1562^2 + 495^2 .

It is not a de Polignac number, because 2684869 - 2⁵ = 2684837 is a prime.

It is a super-2 number, since 2×2684869² = 14417043094322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2684809) 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, 10974 + ... + 11215.

2^2684869 is an apocalyptic number.

It is an amenable number.

2684869 is a deficient number, since it is larger than the sum of its proper divisors (266401).

2684869 is a wasteful number, since it uses less digits than its factorization.

2684869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22211 (or 22200 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 2684869 is about 1638.5569871079. The cubic root of 2684869 is about 138.9870595065.

It can be divided in two parts, 2684 and 869, that added together give a palindrome (3553).

The spelling of 2684869 in words is "two million, six hundred eighty-four thousand, eight hundred sixty-nine".