6404873 has 2 divisors, whose sum is σ = 6404874. Its totient is φ = 6404872.

The previous prime is 6404837. The next prime is 6404917. The reversal of 6404873 is 3784046.

It is a happy number.

Together with previous prime (6404837) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5607424 + 797449 = 2368^2 + 893^2 .

It is a cyclic number.

It is not a de Polignac number, because 6404873 - 2⁶ = 6404809 is a prime.

It is a super-2 number, since 2×6404873² = 82044796292258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6404473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202436 + 3202437.

It is an arithmetic number, because the mean of its divisors is an integer number (3202437).

Almost surely, 2^6404873 is an apocalyptic number.

It is an amenable number.

6404873 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404873 is an equidigital number, since it uses as much as digits as its factorization.

6404873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 6404873 is about 2530.7850560646. The cubic root of 6404873 is about 185.7106631866.

The spelling of 6404873 in words is "six million, four hundred four thousand, eight hundred seventy-three".