6404633 has 4 divisors (see below), whose sum is σ = 6441828. Its totient is φ = 6367440.

The previous prime is 6404623. The next prime is 6404639. The reversal of 6404633 is 3364046.

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 3193369 + 3211264 = 1787^2 + 1792^2 .

It is a cyclic number.

It is not a de Polignac number, because 6404633 - 2¹⁸ = 6142489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6404639) 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, 18338 + ... + 18683.

It is an arithmetic number, because the mean of its divisors is an integer number (1610457).

Almost surely, 2^6404633 is an apocalyptic number.

It is an amenable number.

6404633 is a deficient number, since it is larger than the sum of its proper divisors (37195).

6404633 is a wasteful number, since it uses less digits than its factorization.

6404633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37194.

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 6404633 is about 2530.7376395035. The cubic root of 6404633 is about 185.7083435405.

Adding to 6404633 its reverse (3364046), we get a palindrome (9768679).

The spelling of 6404633 in words is "six million, four hundred four thousand, six hundred thirty-three".