6243891 has 4 divisors (see below), whose sum is σ = 8325192. Its totient is φ = 4162592.

The previous prime is 6243871. The next prime is 6243893. The reversal of 6243891 is 1983426.

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 6243891 - 2⁵ = 6243859 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6243893) 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, 1040646 + ... + 1040651.

It is an arithmetic number, because the mean of its divisors is an integer number (2081298).

Almost surely, 2^6243891 is an apocalyptic number.

6243891 is a deficient number, since it is larger than the sum of its proper divisors (2081301).

6243891 is a wasteful number, since it uses less digits than its factorization.

6243891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081300.

The product of its digits is 10368, while the sum is 33.

The square root of 6243891 is about 2498.7779012950. Note that the first 3 decimals coincide. The cubic root of 6243891 is about 184.1415400385.

The spelling of 6243891 in words is "six million, two hundred forty-three thousand, eight hundred ninety-one".