6708649 has 2 divisors, whose sum is σ = 6708650. Its totient is φ = 6708648.

The previous prime is 6708631. The next prime is 6708661. The reversal of 6708649 is 9468076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6451600 + 257049 = 2540^2 + 507^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6708649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6708619) 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 as a sum of consecutive naturals, namely, 3354324 + 3354325.

It is an arithmetic number, because the mean of its divisors is an integer number (3354325).

Almost surely, 2^6708649 is an apocalyptic number.

It is an amenable number.

6708649 is a deficient number, since it is larger than the sum of its proper divisors (1).

6708649 is an equidigital number, since it uses as much as digits as its factorization.

6708649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 6708649 is about 2590.1059823876. The cubic root of 6708649 is about 188.6014482522.

The spelling of 6708649 in words is "six million, seven hundred eight thousand, six hundred forty-nine".