6459643 has 4 divisors (see below), whose sum is σ = 6839640. Its totient is φ = 6079648.

The previous prime is 6459637. The next prime is 6459659. The reversal of 6459643 is 3469546.

It is a happy number.

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 6459643 - 2¹³ = 6451451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6459613) 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, 189973 + ... + 190006.

It is an arithmetic number, because the mean of its divisors is an integer number (1709910).

Almost surely, 2^6459643 is an apocalyptic number.

6459643 is a deficient number, since it is larger than the sum of its proper divisors (379997).

6459643 is a wasteful number, since it uses less digits than its factorization.

6459643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379996.

The product of its digits is 77760, while the sum is 37.

The square root of 6459643 is about 2541.5827745718. The cubic root of 6459643 is about 186.2385173769.

The spelling of 6459643 in words is "six million, four hundred fifty-nine thousand, six hundred forty-three".