6813993 has 8 divisors (see below), whose sum is σ = 9136800. Its totient is φ = 4516928.

The previous prime is 6813977. The next prime is 6814001. The reversal of 6813993 is 3993186.

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 6813993 - 2⁴ = 6813977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6813943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5808 + ... + 6881.

It is an arithmetic number, because the mean of its divisors is an integer number (1142100).

Almost surely, 2^6813993 is an apocalyptic number.

It is an amenable number.

6813993 is a deficient number, since it is larger than the sum of its proper divisors (2322807).

6813993 is a wasteful number, since it uses less digits than its factorization.

6813993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12871.

The product of its digits is 34992, while the sum is 39.

The square root of 6813993 is about 2610.3626184881. The cubic root of 6813993 is about 189.5835106011.

The spelling of 6813993 in words is "six million, eight hundred thirteen thousand, nine hundred ninety-three".