6809869 has 4 divisors (see below), whose sum is σ = 7428960. Its totient is φ = 6190780.

The previous prime is 6809851. The next prime is 6809893. The reversal of 6809869 is 9689086.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6809869 - 2⁵ = 6809837 is a prime.

It is a super-2 number, since 2×6809869² = 92748631594322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6809849) 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 3 ways as a sum of consecutive naturals, for example, 309529 + ... + 309550.

It is an arithmetic number, because the mean of its divisors is an integer number (1857240).

Almost surely, 2^6809869 is an apocalyptic number.

It is an amenable number.

6809869 is a deficient number, since it is larger than the sum of its proper divisors (619091).

6809869 is a wasteful number, since it uses less digits than its factorization.

6809869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619090.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 6809869 is about 2609.5725703647. The cubic root of 6809869 is about 189.5452559790.

The spelling of 6809869 in words is "six million, eight hundred nine thousand, eight hundred sixty-nine".