6443849 has 4 divisors (see below), whose sum is σ = 6472464. Its totient is φ = 6415236.

The previous prime is 6443839. The next prime is 6443863. The reversal of 6443849 is 9483446.

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 a de Polignac number, because none of the positive numbers 2^k-6443849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6443839) 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, 13967 + ... + 14420.

It is an arithmetic number, because the mean of its divisors is an integer number (1618116).

Almost surely, 2^6443849 is an apocalyptic number.

It is an amenable number.

6443849 is a deficient number, since it is larger than the sum of its proper divisors (28615).

6443849 is a wasteful number, since it uses less digits than its factorization.

6443849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28614.

The product of its digits is 82944, while the sum is 38.

The square root of 6443849 is about 2538.4737540499. The cubic root of 6443849 is about 186.0866074486.

The spelling of 6443849 in words is "six million, four hundred forty-three thousand, eight hundred forty-nine".