6840089 has 4 divisors (see below), whose sum is σ = 6860724. Its totient is φ = 6819456.

The previous prime is 6840083. The next prime is 6840091. The reversal of 6840089 is 9800486.

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 2534464 + 4305625 = 1592^2 + 2075^2 .

It is a cyclic number.

It is not a de Polignac number, because 6840089 - 2⁴ = 6840073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6840083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9812 + ... + 10485.

It is an arithmetic number, because the mean of its divisors is an integer number (1715181).

Almost surely, 2^6840089 is an apocalyptic number.

It is an amenable number.

6840089 is a deficient number, since it is larger than the sum of its proper divisors (20635).

6840089 is a wasteful number, since it uses less digits than its factorization.

6840089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20634.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 6840089 is about 2615.3563810693. The cubic root of 6840089 is about 189.8252224695.

The spelling of 6840089 in words is "six million, eight hundred forty thousand, eighty-nine".