6819401 has 2 divisors, whose sum is σ = 6819402. Its totient is φ = 6819400.

The previous prime is 6819389. The next prime is 6819403. The reversal of 6819401 is 1049186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4182025 + 2637376 = 2045^2 + 1624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6819401 is a prime.

Together with 6819403, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6819403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3409700 + 3409701.

It is an arithmetic number, because the mean of its divisors is an integer number (3409701).

Almost surely, 2^6819401 is an apocalyptic number.

It is an amenable number.

6819401 is a deficient number, since it is larger than the sum of its proper divisors (1).

6819401 is an equidigital number, since it uses as much as digits as its factorization.

6819401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 6819401 is about 2611.3982844446. The cubic root of 6819401 is about 189.6336523465.

The spelling of 6819401 in words is "six million, eight hundred nineteen thousand, four hundred one".