6688933 has 2 divisors, whose sum is σ = 6688934. Its totient is φ = 6688932.

The previous prime is 6688919. The next prime is 6688943. The reversal of 6688933 is 3398866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6646084 + 42849 = 2578^2 + 207^2 .

It is a cyclic number.

It is not a de Polignac number, because 6688933 - 2⁹ = 6688421 is a prime.

6688933 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6688933.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6688943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344466 + 3344467.

It is an arithmetic number, because the mean of its divisors is an integer number (3344467).

Almost surely, 2^6688933 is an apocalyptic number.

It is an amenable number.

6688933 is a deficient number, since it is larger than the sum of its proper divisors (1).

6688933 is an equidigital number, since it uses as much as digits as its factorization.

6688933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 6688933 is about 2586.2971600340. The cubic root of 6688933 is about 188.4165071491.

The spelling of 6688933 in words is "six million, six hundred eighty-eight thousand, nine hundred thirty-three".