6811949 has 2 divisors, whose sum is σ = 6811950. Its totient is φ = 6811948.

The previous prime is 6811943. The next prime is 6811967. The reversal of 6811949 is 9491186.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3724900 + 3087049 = 1930^2 + 1757^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6811949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6811943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3405974 + 3405975.

It is an arithmetic number, because the mean of its divisors is an integer number (3405975).

Almost surely, 2^6811949 is an apocalyptic number.

It is an amenable number.

6811949 is a deficient number, since it is larger than the sum of its proper divisors (1).

6811949 is an equidigital number, since it uses as much as digits as its factorization.

6811949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 6811949 is about 2609.9710726366. The cubic root of 6811949 is about 189.5645521896.

The spelling of 6811949 in words is "six million, eight hundred eleven thousand, nine hundred forty-nine".