6798991 has 2 divisors, whose sum is σ = 6798992. Its totient is φ = 6798990.

The previous prime is 6798971. The next prime is 6799003. The reversal of 6798991 is 1998976.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6798991 - 2⁷ = 6798863 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 (6798901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3399495 + 3399496.

It is an arithmetic number, because the mean of its divisors is an integer number (3399496).

Almost surely, 2^6798991 is an apocalyptic number.

6798991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6798991 is an equidigital number, since it uses as much as digits as its factorization.

6798991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 49.

The square root of 6798991 is about 2607.4874879853. The cubic root of 6798991 is about 189.4442764477. Note that the first 3 decimals are identical.

The spelling of 6798991 in words is "six million, seven hundred ninety-eight thousand, nine hundred ninety-one".