6921013 has 8 divisors (see below), whose sum is σ = 7570656. Its totient is φ = 6274800.

The previous prime is 6921007. The next prime is 6921017. The reversal of 6921013 is 3101296.

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 6921013 - 2¹⁷ = 6789941 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 (6921017) 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 7 ways as a sum of consecutive naturals, for example, 5370 + ... + 6532.

It is an arithmetic number, because the mean of its divisors is an integer number (946332).

Almost surely, 2^6921013 is an apocalyptic number.

It is an amenable number.

6921013 is a deficient number, since it is larger than the sum of its proper divisors (649643).

6921013 is a wasteful number, since it uses less digits than its factorization.

6921013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 6921013 is about 2630.7818229568. The cubic root of 6921013 is about 190.5708868350.

The spelling of 6921013 in words is "six million, nine hundred twenty-one thousand, thirteen".