4509643 has 4 divisors (see below), whose sum is σ = 4545280. Its totient is φ = 4474008.

The previous prime is 4509623. The next prime is 4509647. The reversal of 4509643 is 3469054.

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

It is a cyclic number.

It is not a de Polignac number, because 4509643 - 2¹³ = 4501451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4509647) 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 3 ways as a sum of consecutive naturals, for example, 17628 + ... + 17881.

It is an arithmetic number, because the mean of its divisors is an integer number (1136320).

Almost surely, 2^4509643 is an apocalyptic number.

4509643 is a deficient number, since it is larger than the sum of its proper divisors (35637).

4509643 is a wasteful number, since it uses less digits than its factorization.

4509643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35636.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 4509643 is about 2123.5920041289. The cubic root of 4509643 is about 165.2142060298.

The spelling of 4509643 in words is "four million, five hundred nine thousand, six hundred forty-three".