6440963 has 8 divisors (see below), whose sum is σ = 6692736. Its totient is φ = 6192000.

The previous prime is 6440953. The next prime is 6440969. The reversal of 6440963 is 3690446.

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

It is a cyclic number.

It is not a de Polignac number, because 6440963 - 2⁴ = 6440947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6440969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4763 + ... + 5963.

It is an arithmetic number, because the mean of its divisors is an integer number (836592).

Almost surely, 2^6440963 is an apocalyptic number.

6440963 is a deficient number, since it is larger than the sum of its proper divisors (251773).

6440963 is a wasteful number, since it uses less digits than its factorization.

6440963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405.

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

The square root of 6440963 is about 2537.9052385777. The cubic root of 6440963 is about 186.0588224946.

The spelling of 6440963 in words is "six million, four hundred forty thousand, nine hundred sixty-three".