6819481 has 2 divisors, whose sum is σ = 6819482. Its totient is φ = 6819480.

The previous prime is 6819443. The next prime is 6819493. The reversal of 6819481 is 1849186.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4447881 + 2371600 = 2109^2 + 1540^2 .

It is a cyclic number.

It is not a de Polignac number, because 6819481 - 2⁷ = 6819353 is a prime.

It is a super-2 number, since 2×6819481² = 93010642218722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6819481.

It is not a weakly prime, because it can be changed into another prime (6819401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3409740 + 3409741.

It is an arithmetic number, because the mean of its divisors is an integer number (3409741).

Almost surely, 2^6819481 is an apocalyptic number.

It is an amenable number.

6819481 is a deficient number, since it is larger than the sum of its proper divisors (1).

6819481 is an equidigital number, since it uses as much as digits as its factorization.

6819481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 37.

The square root of 6819481 is about 2611.4136018639. The cubic root of 6819481 is about 189.6343938893.

The spelling of 6819481 in words is "six million, eight hundred nineteen thousand, four hundred eighty-one".