6689493 has 8 divisors (see below), whose sum is σ = 9910400. Its totient is φ = 4459644.

The previous prime is 6689491. The next prime is 6689497. The reversal of 6689493 is 3949866.

It is not a de Polignac number, because 6689493 - 2¹ = 6689491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6689491) 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 7 ways as a sum of consecutive naturals, for example, 123853 + ... + 123906.

It is an arithmetic number, because the mean of its divisors is an integer number (1238800).

Almost surely, 2^6689493 is an apocalyptic number.

It is an amenable number.

6689493 is a deficient number, since it is larger than the sum of its proper divisors (3220907).

6689493 is a wasteful number, since it uses less digits than its factorization.

6689493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247768 (or 247762 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 6689493 is about 2586.4054206562. The cubic root of 6689493 is about 188.4217651028.

The spelling of 6689493 in words is "six million, six hundred eighty-nine thousand, four hundred ninety-three".