6780689 has 4 divisors (see below), whose sum is σ = 6798960. Its totient is φ = 6762420.

The previous prime is 6780679. The next prime is 6780707. The reversal of 6780689 is 9860876.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6780689 - 2²⁰ = 5732113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6780619) 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, 8567 + ... + 9324.

It is an arithmetic number, because the mean of its divisors is an integer number (1699740).

Almost surely, 2^6780689 is an apocalyptic number.

It is an amenable number.

6780689 is a deficient number, since it is larger than the sum of its proper divisors (18271).

6780689 is a wasteful number, since it uses less digits than its factorization.

6780689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18270.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 6780689 is about 2603.9756143251. The cubic root of 6780689 is about 189.2741372363.

The spelling of 6780689 in words is "six million, seven hundred eighty thousand, six hundred eighty-nine".