6872643 has 6 divisors (see below), whose sum is σ = 9927164. Its totient is φ = 4581756.

The previous prime is 6872633. The next prime is 6872651. The reversal of 6872643 is 3462786.

6872643 is a `hidden beast` number, since 6 + 8 + 7 + 2 + 643 = 666.

6872643 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6872643 - 2⁴ = 6872627 is a prime.

It is a Duffinian number.

6872643 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6872598 and 6872607.

It is not an unprimeable number, because it can be changed into a prime (6872603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 381805 + ... + 381822.

Almost surely, 2^6872643 is an apocalyptic number.

6872643 is a deficient number, since it is larger than the sum of its proper divisors (3054521).

6872643 is a wasteful number, since it uses less digits than its factorization.

6872643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763633 (or 763630 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 6872643 is about 2621.5726196312. The cubic root of 6872643 is about 190.1258907145.

The spelling of 6872643 in words is "six million, eight hundred seventy-two thousand, six hundred forty-three".