6872989 has 4 divisors (see below), whose sum is σ = 6916924. Its totient is φ = 6829056.

The previous prime is 6872963. The next prime is 6873001. The reversal of 6872989 is 9892786.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9892786 = 2 ⋅4946393.

It can be written as a sum of positive squares in 2 ways, for example, as 870489 + 6002500 = 933^2 + 2450^2 .

It is a cyclic number.

It is not a de Polignac number, because 6872989 - 2⁹ = 6872477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6872909) 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, 21732 + ... + 22045.

It is an arithmetic number, because the mean of its divisors is an integer number (1729231).

Almost surely, 2^6872989 is an apocalyptic number.

It is an amenable number.

6872989 is a deficient number, since it is larger than the sum of its proper divisors (43935).

6872989 is a wasteful number, since it uses less digits than its factorization.

6872989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43934.

The product of its digits is 435456, while the sum is 49.

The square root of 6872989 is about 2621.6386097248. The cubic root of 6872989 is about 190.1290812606.

The spelling of 6872989 in words is "six million, eight hundred seventy-two thousand, nine hundred eighty-nine".