6404963 has 4 divisors (see below), whose sum is σ = 6410040. Its totient is φ = 6399888.

The previous prime is 6404929. The next prime is 6404987. The reversal of 6404963 is 3694046.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3694046 = 2 ⋅1847023.

It is a cyclic number.

It is not a de Polignac number, because 6404963 - 2¹⁰ = 6403939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6404063) 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 in 3 ways as a sum of consecutive naturals, for example, 983 + ... + 3711.

It is an arithmetic number, because the mean of its divisors is an integer number (1602510).

Almost surely, 2^6404963 is an apocalyptic number.

6404963 is a deficient number, since it is larger than the sum of its proper divisors (5077).

6404963 is a wasteful number, since it uses less digits than its factorization.

6404963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5076.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 6404963 is about 2530.8028370460. The cubic root of 6404963 is about 185.7115330389.

The spelling of 6404963 in words is "six million, four hundred four thousand, nine hundred sixty-three".