6817949 has 2 divisors, whose sum is σ = 6817950. Its totient is φ = 6817948.

The previous prime is 6817927. The next prime is 6817957. The reversal of 6817949 is 9497186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6285049 + 532900 = 2507^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 6817949 - 2¹² = 6813853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6817999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3408974 + 3408975.

It is an arithmetic number, because the mean of its divisors is an integer number (3408975).

Almost surely, 2^6817949 is an apocalyptic number.

It is an amenable number.

6817949 is a deficient number, since it is larger than the sum of its proper divisors (1).

6817949 is an equidigital number, since it uses as much as digits as its factorization.

6817949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 6817949 is about 2611.1202576672. The cubic root of 6817949 is about 189.6201923369.

The spelling of 6817949 in words is "six million, eight hundred seventeen thousand, nine hundred forty-nine".