6819913 has 2 divisors, whose sum is σ = 6819914. Its totient is φ = 6819912.

The previous prime is 6819893. The next prime is 6819931. The reversal of 6819913 is 3199186.

Together with next prime (6819931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5212089 + 1607824 = 2283^2 + 1268^2 .

It is a cyclic number.

It is not a de Polignac number, because 6819913 - 2⁹ = 6819401 is a prime.

It is a super-2 number, since 2×6819913² = 93022426655138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6819013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3409956 + 3409957.

It is an arithmetic number, because the mean of its divisors is an integer number (3409957).

Almost surely, 2^6819913 is an apocalyptic number.

It is an amenable number.

6819913 is a deficient number, since it is larger than the sum of its proper divisors (1).

6819913 is an equidigital number, since it uses as much as digits as its factorization.

6819913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 37.

The square root of 6819913 is about 2611.4963143761. The cubic root of 6819913 is about 189.6383981201.

The spelling of 6819913 in words is "six million, eight hundred nineteen thousand, nine hundred thirteen".