6368891 has 4 divisors (see below), whose sum is σ = 6379800. Its totient is φ = 6357984.

The previous prime is 6368881. The next prime is 6368917. The reversal of 6368891 is 1988636.

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 6368891 - 2¹⁸ = 6106747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6368881) 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, 4526 + ... + 5763.

It is an arithmetic number, because the mean of its divisors is an integer number (1594950).

Almost surely, 2^6368891 is an apocalyptic number.

6368891 is a deficient number, since it is larger than the sum of its proper divisors (10909).

6368891 is a wasteful number, since it uses less digits than its factorization.

6368891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10908.

The product of its digits is 62208, while the sum is 41.

The square root of 6368891 is about 2523.6661823625. Note that the first 3 decimals coincide. The cubic root of 6368891 is about 185.3622413056.

The spelling of 6368891 in words is "six million, three hundred sixty-eight thousand, eight hundred ninety-one".