2806669 has 4 divisors (see below), whose sum is σ = 2811996. Its totient is φ = 2801344.

The previous prime is 2806663. The next prime is 2806673. The reversal of 2806669 is 9666082.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1077444 + 1729225 = 1038^2 + 1315^2 .

It is a cyclic number.

It is not a de Polignac number, because 2806669 - 2⁹ = 2806157 is a prime.

It is a super-2 number, since 2×2806669² = 15754781751122, 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 (2806663) 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, 1774 + ... + 2959.

It is an arithmetic number, because the mean of its divisors is an integer number (702999).

2^2806669 is an apocalyptic number.

It is an amenable number.

2806669 is a deficient number, since it is larger than the sum of its proper divisors (5327).

2806669 is an equidigital number, since it uses as much as digits as its factorization.

2806669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5326.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 2806669 is about 1675.3116128052. The cubic root of 2806669 is about 141.0577869535.

The spelling of 2806669 in words is "two million, eight hundred six thousand, six hundred sixty-nine".