6813819 has 12 divisors (see below), whose sum is σ = 10270416. Its totient is φ = 4344912.

The previous prime is 6813817. The next prime is 6813847. The reversal of 6813819 is 9183186.

It is not a de Polignac number, because 6813819 - 2¹ = 6813817 is a prime.

It is a super-2 number, since 2×6813819² = 92856258729522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6813817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16252 + ... + 16665.

It is an arithmetic number, because the mean of its divisors is an integer number (855868).

Almost surely, 2^6813819 is an apocalyptic number.

6813819 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

6813819 is a deficient number, since it is larger than the sum of its proper divisors (3456597).

6813819 is a wasteful number, since it uses less digits than its factorization.

6813819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32946 (or 32943 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 6813819 is about 2610.3292895725. The cubic root of 6813819 is about 189.5818968722.

The spelling of 6813819 in words is "six million, eight hundred thirteen thousand, eight hundred nineteen".