6877981 has 8 divisors (see below), whose sum is σ = 7898400. Its totient is φ = 5923440.

The previous prime is 6877963. The next prime is 6877993. The reversal of 6877981 is 1897786.

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

It is not a de Polignac number, because 6877981 - 2¹¹ = 6875933 is a prime.

It is a super-2 number, since 2×6877981² = 94613245272722, 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 (6877921) 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, 16246 + ... + 16663.

It is an arithmetic number, because the mean of its divisors is an integer number (987300).

Almost surely, 2^6877981 is an apocalyptic number.

It is an amenable number.

6877981 is a deficient number, since it is larger than the sum of its proper divisors (1020419).

6877981 is a wasteful number, since it uses less digits than its factorization.

6877981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32939.

The product of its digits is 169344, while the sum is 46.

The square root of 6877981 is about 2622.5905132140. The cubic root of 6877981 is about 190.1751017366.

It can be divided in two parts, 687 and 7981, that added together give a palindrome (8668).

The spelling of 6877981 in words is "six million, eight hundred seventy-seven thousand, nine hundred eighty-one".