6368921 has 8 divisors (see below), whose sum is σ = 7044744. Its totient is φ = 5719680.

The previous prime is 6368917. The next prime is 6368927. The reversal of 6368921 is 1298636.

It can be written as a sum of positive squares in 4 ways, for example, as 3168400 + 3200521 = 1780^2 + 1789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6368921 - 2² = 6368917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6368927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6140 + ... + 7101.

It is an arithmetic number, because the mean of its divisors is an integer number (880593).

Almost surely, 2^6368921 is an apocalyptic number.

It is an amenable number.

6368921 is a deficient number, since it is larger than the sum of its proper divisors (675823).

6368921 is a wasteful number, since it uses less digits than its factorization.

6368921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13291.

The product of its digits is 15552, while the sum is 35.

The square root of 6368921 is about 2523.6721260893. The cubic root of 6368921 is about 185.3625323484.

The spelling of 6368921 in words is "six million, three hundred sixty-eight thousand, nine hundred twenty-one".