6635963 has 2 divisors, whose sum is σ = 6635964. Its totient is φ = 6635962.

The previous prime is 6635957. The next prime is 6636011. The reversal of 6635963 is 3695366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6635963 - 2⁴ = 6635947 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (6635903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3317981 + 3317982.

It is an arithmetic number, because the mean of its divisors is an integer number (3317982).

Almost surely, 2^6635963 is an apocalyptic number.

6635963 is a deficient number, since it is larger than the sum of its proper divisors (1).

6635963 is an equidigital number, since it uses as much as digits as its factorization.

6635963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 38.

The square root of 6635963 is about 2576.0362963281. The cubic root of 6635963 is about 187.9178285078.

The spelling of 6635963 in words is "six million, six hundred thirty-five thousand, nine hundred sixty-three".