6943809 has 4 divisors (see below), whose sum is σ = 9258416. Its totient is φ = 4629204.

The previous prime is 6943793. The next prime is 6943819. The reversal of 6943809 is 9083496.

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 not a de Polignac number, because 6943809 - 2⁴ = 6943793 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6943819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157299 + ... + 1157304.

It is an arithmetic number, because the mean of its divisors is an integer number (2314604).

Almost surely, 2^6943809 is an apocalyptic number.

It is an amenable number.

6943809 is a deficient number, since it is larger than the sum of its proper divisors (2314607).

6943809 is a wasteful number, since it uses less digits than its factorization.

6943809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314606.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 6943809 is about 2635.1108136092. The cubic root of 6943809 is about 190.7798876963.

The spelling of 6943809 in words is "six million, nine hundred forty-three thousand, eight hundred nine".