2686643 has 4 divisors (see below), whose sum is σ = 2716920. Its totient is φ = 2656368.

The previous prime is 2686631. The next prime is 2686667. The reversal of 2686643 is 3466862.

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 2686643 - 2²⁰ = 1638067 is a prime.

It is a d-powerful number, because it can be written as 2²¹ + 6³ + 8³ + 6⁶ + 6⁷ + 4⁹ + 3³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2686603) 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, 15005 + ... + 15182.

It is an arithmetic number, because the mean of its divisors is an integer number (679230).

2^2686643 is an apocalyptic number.

2686643 is a deficient number, since it is larger than the sum of its proper divisors (30277).

2686643 is an equidigital number, since it uses as much as digits as its factorization.

2686643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30276.

The product of its digits is 41472, while the sum is 35.

The square root of 2686643 is about 1639.0982276850. The cubic root of 2686643 is about 139.0176641975.

The spelling of 2686643 in words is "two million, six hundred eighty-six thousand, six hundred forty-three".