6404743 has 2 divisors, whose sum is σ = 6404744. Its totient is φ = 6404742.

The previous prime is 6404719. The next prime is 6404753. The reversal of 6404743 is 3474046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6404743 - 2⁵ = 6404711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6404753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202371 + 3202372.

It is an arithmetic number, because the mean of its divisors is an integer number (3202372).

Almost surely, 2^6404743 is an apocalyptic number.

6404743 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404743 is an equidigital number, since it uses as much as digits as its factorization.

6404743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 6404743 is about 2530.7593722043. The cubic root of 6404743 is about 185.7094067188.

Adding to 6404743 its reverse (3474046), we get a palindrome (9878789).

The spelling of 6404743 in words is "six million, four hundred four thousand, seven hundred forty-three".