6781084489 has 4 divisors (see below), whose sum is σ = 6781461120. Its totient is φ = 6780707860.

The previous prime is 6781084487. The next prime is 6781084493. The reversal of 6781084489 is 9844801876.

It is a happy number.

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 6781084489 - 2¹ = 6781084487 is a prime.

It is a super-2 number, since 2×6781084489² = 91966213693912782242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6781084481) 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, 159877 + ... + 197794.

It is an arithmetic number, because the mean of its divisors is an integer number (1695365280).

Almost surely, 2^6781084489 is an apocalyptic number.

It is an amenable number.

6781084489 is a deficient number, since it is larger than the sum of its proper divisors (376631).

6781084489 is a wasteful number, since it uses less digits than its factorization.

6781084489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376630.

The product of its (nonzero) digits is 3096576, while the sum is 55.

The square root of 6781084489 is about 82347.3405095757. The cubic root of 6781084489 is about 1892.7781701889.

The spelling of 6781084489 in words is "six billion, seven hundred eighty-one million, eighty-four thousand, four hundred eighty-nine".