6405963 has 8 divisors (see below), whose sum is σ = 8749776. Its totient is φ = 4166400.

The previous prime is 6405943. The next prime is 6405979. The reversal of 6405963 is 3695046.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6405963 - 2⁶ = 6405899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6405913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25918 + ... + 26163.

It is an arithmetic number, because the mean of its divisors is an integer number (1093722).

Almost surely, 2^6405963 is an apocalyptic number.

6405963 is a deficient number, since it is larger than the sum of its proper divisors (2343813).

6405963 is a wasteful number, since it uses less digits than its factorization.

6405963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52125.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 6405963 is about 2531.0003951007. Note that the first 3 decimals coincide. The cubic root of 6405963 is about 185.7211975168.

The spelling of 6405963 in words is "six million, four hundred five thousand, nine hundred sixty-three".