6403633 has 4 divisors (see below), whose sum is σ = 6491428. Its totient is φ = 6315840.

The previous prime is 6403601. The next prime is 6403643. The reversal of 6403633 is 3363046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2782224 + 3621409 = 1668^2 + 1903^2 .

It is a cyclic number.

It is not a de Polignac number, because 6403633 - 2⁵ = 6403601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6403598 and 6403607.

It is not an unprimeable number, because it can be changed into a prime (6403643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43788 + ... + 43933.

It is an arithmetic number, because the mean of its divisors is an integer number (1622857).

Almost surely, 2^6403633 is an apocalyptic number.

It is an amenable number.

6403633 is a deficient number, since it is larger than the sum of its proper divisors (87795).

6403633 is an equidigital number, since it uses as much as digits as its factorization.

6403633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87794.

The product of its (nonzero) digits is 3888, while the sum is 25.

The square root of 6403633 is about 2530.5400609356. The cubic root of 6403633 is about 185.6986777246.

Adding to 6403633 its reverse (3363046), we get a palindrome (9766679).

The spelling of 6403633 in words is "six million, four hundred three thousand, six hundred thirty-three".