6813989 has 24 divisors (see below), whose sum is σ = 9001440. Its totient is φ = 5098464.

The previous prime is 6813977. The next prime is 6814001. The reversal of 6813989 is 9893186.

6813989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6813977) and next prime (6814001).

It is not a de Polignac number, because 6813989 - 2⁴ = 6813973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6813949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11822 + ... + 12384.

It is an arithmetic number, because the mean of its divisors is an integer number (375060).

Almost surely, 2^6813989 is an apocalyptic number.

It is an amenable number.

6813989 is a deficient number, since it is larger than the sum of its proper divisors (2187451).

6813989 is a wasteful number, since it uses less digits than its factorization.

6813989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609 (or 602 counting only the distinct ones).

The product of its digits is 93312, while the sum is 44.

The square root of 6813989 is about 2610.3618523109. The cubic root of 6813989 is about 189.5834735042.

The spelling of 6813989 in words is "six million, eight hundred thirteen thousand, nine hundred eighty-nine".