6439633 has 4 divisors (see below), whose sum is σ = 6447168. Its totient is φ = 6432100.

The previous prime is 6439619. The next prime is 6439639. The reversal of 6439633 is 3369346.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6439633 - 2¹³ = 6431441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6439639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2293 + ... + 4258.

It is an arithmetic number, because the mean of its divisors is an integer number (1611792).

Almost surely, 2^6439633 is an apocalyptic number.

It is an amenable number.

6439633 is a deficient number, since it is larger than the sum of its proper divisors (7535).

6439633 is an equidigital number, since it uses as much as digits as its factorization.

6439633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7534.

The product of its digits is 34992, while the sum is 34.

The square root of 6439633 is about 2537.6431979299. The cubic root of 6439633 is about 186.0460151308.

The spelling of 6439633 in words is "six million, four hundred thirty-nine thousand, six hundred thirty-three".