6404407 has 2 divisors, whose sum is σ = 6404408. Its totient is φ = 6404406.

The previous prime is 6404401. The next prime is 6404449. The reversal of 6404407 is 7044046.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6404407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6404401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202203 + 3202204.

It is an arithmetic number, because the mean of its divisors is an integer number (3202204).

Almost surely, 2^6404407 is an apocalyptic number.

6404407 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404407 is an equidigital number, since it uses as much as digits as its factorization.

6404407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 6404407 is about 2530.6929880963. The cubic root of 6404407 is about 185.7061591541.

The spelling of 6404407 in words is "six million, four hundred four thousand, four hundred seven".