7963643 has 12 divisors (see below), whose sum is σ = 8404920. Its totient is φ = 7541856.

The previous prime is 7963607. The next prime is 7963663. The reversal of 7963643 is 3463697.

It is a happy number.

It is not a de Polignac number, because 7963643 - 2²⁰ = 6915067 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7963597 and 7963606.

It is not an unprimeable number, because it can be changed into a prime (7963663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109055 + ... + 109127.

It is an arithmetic number, because the mean of its divisors is an integer number (700410).

Almost surely, 2^7963643 is an apocalyptic number.

7963643 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

7963643 is a deficient number, since it is larger than the sum of its proper divisors (441277).

7963643 is an equidigital number, since it uses as much as digits as its factorization.

7963643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 175 counting only the distinct ones).

The product of its digits is 81648, while the sum is 38.

The square root of 7963643 is about 2821.9927356391. The cubic root of 7963643 is about 199.6965648684.

The spelling of 7963643 in words is "seven million, nine hundred sixty-three thousand, six hundred forty-three".