6867981 has 12 divisors (see below), whose sum is σ = 10012860. Its totient is φ = 4536000.

The previous prime is 6867967. The next prime is 6867989. The reversal of 6867981 is 1897686.

6867981 = T₁₃₄ + T₁₃₅ + ... + T₃₅₁.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3861225 + 3006756 = 1965^2 + 1734^2 .

It is not a de Polignac number, because 6867981 - 2¹⁰ = 6866957 is a prime.

It is a super-2 number, since 2×6867981² = 94338326032722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6867989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2520 + ... + 4481.

It is an arithmetic number, because the mean of its divisors is an integer number (834405).

Almost surely, 2^6867981 is an apocalyptic number.

It is an amenable number.

6867981 is a deficient number, since it is larger than the sum of its proper divisors (3144879).

6867981 is a wasteful number, since it uses less digits than its factorization.

6867981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7116 (or 7113 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 6867981 is about 2620.6833078417. The cubic root of 6867981 is about 190.0828908866.

The spelling of 6867981 in words is "six million, eight hundred sixty-seven thousand, nine hundred eighty-one".