6689913 has 4 divisors (see below), whose sum is σ = 8919888. Its totient is φ = 4459940.

The previous prime is 6689909. The next prime is 6689971. The reversal of 6689913 is 3199866.

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 6689913 - 2² = 6689909 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6689413) 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, 1114983 + ... + 1114988.

It is an arithmetic number, because the mean of its divisors is an integer number (2229972).

Almost surely, 2^6689913 is an apocalyptic number.

It is an amenable number.

6689913 is a deficient number, since it is larger than the sum of its proper divisors (2229975).

6689913 is a wasteful number, since it uses less digits than its factorization.

6689913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229974.

The product of its digits is 69984, while the sum is 42.

The square root of 6689913 is about 2586.4866131492. The cubic root of 6689913 is about 188.4257083755.

The spelling of 6689913 in words is "six million, six hundred eighty-nine thousand, nine hundred thirteen".