6403533 has 8 divisors (see below), whose sum is σ = 8641248. Its totient is φ = 4217424.

The previous prime is 6403511. The next prime is 6403571. The reversal of 6403533 is 3353046.

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

It is not a de Polignac number, because 6403533 - 2⁶ = 6403469 is a prime.

6403533 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12610 + ... + 13107.

It is an arithmetic number, because the mean of its divisors is an integer number (1080156).

Almost surely, 2^6403533 is an apocalyptic number.

It is an amenable number.

6403533 is a deficient number, since it is larger than the sum of its proper divisors (2237715).

6403533 is a wasteful number, since it uses less digits than its factorization.

6403533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25803.

The product of its (nonzero) digits is 3240, while the sum is 24.

The square root of 6403533 is about 2530.5203022304. The cubic root of 6403533 is about 185.6977110877.

Adding to 6403533 its reverse (3353046), we get a palindrome (9756579).

The spelling of 6403533 in words is "six million, four hundred three thousand, five hundred thirty-three".