6928013 has 4 divisors (see below), whose sum is σ = 7166940. Its totient is φ = 6689088.

The previous prime is 6928003. The next prime is 6928021. The reversal of 6928013 is 3108296.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4656964 + 2271049 = 2158^2 + 1507^2 .

It is a cyclic number.

It is not a de Polignac number, because 6928013 - 2⁴ = 6927997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 238897 = 6928013 / (6 + 9 + 2 + 8 + 0 + 1 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6928003) 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, 119420 + ... + 119477.

It is an arithmetic number, because the mean of its divisors is an integer number (1791735).

Almost surely, 2^6928013 is an apocalyptic number.

It is an amenable number.

6928013 is a deficient number, since it is larger than the sum of its proper divisors (238927).

6928013 is a wasteful number, since it uses less digits than its factorization.

6928013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238926.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 6928013 is about 2632.1118897190. Note that the first 3 decimals coincide. The cubic root of 6928013 is about 190.6351137875.

It can be divided in two parts, 69 and 28013, that added together give a palindrome (28082).

The spelling of 6928013 in words is "six million, nine hundred twenty-eight thousand, thirteen".