6889981 has 8 divisors (see below), whose sum is σ = 8337600. Its totient is φ = 5558208.

The previous prime is 6889969. The next prime is 6889997. The reversal of 6889981 is 1899886.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6889981 - 2⁷ = 6889853 is a prime.

It is a super-2 number, since 2×6889981² = 94943676360722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6889901) 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 7 ways as a sum of consecutive naturals, for example, 28831 + ... + 29068.

It is an arithmetic number, because the mean of its divisors is an integer number (1042200).

Almost surely, 2^6889981 is an apocalyptic number.

It is an amenable number.

6889981 is a deficient number, since it is larger than the sum of its proper divisors (1447619).

6889981 is a wasteful number, since it uses less digits than its factorization.

6889981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57923.

The product of its digits is 248832, while the sum is 49.

The square root of 6889981 is about 2624.8773304671. The cubic root of 6889981 is about 190.2856368541.

The spelling of 6889981 in words is "six million, eight hundred eighty-nine thousand, nine hundred eighty-one".