6864981 has 16 divisors (see below), whose sum is σ = 9558528. Its totient is φ = 4377600.

The previous prime is 6864973. The next prime is 6864983. The reversal of 6864981 is 1894686.

It is not a de Polignac number, because 6864981 - 2³ = 6864973 is a prime.

It is a super-2 number, since 2×6864981² = 94255928260722, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6864983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8641 + ... + 9401.

It is an arithmetic number, because the mean of its divisors is an integer number (597408).

Almost surely, 2^6864981 is an apocalyptic number.

It is an amenable number.

6864981 is a deficient number, since it is larger than the sum of its proper divisors (2693547).

6864981 is a wasteful number, since it uses less digits than its factorization.

6864981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892.

The product of its digits is 82944, while the sum is 42.

The square root of 6864981 is about 2620.1108755165. The cubic root of 6864981 is about 190.0552101789.

The spelling of 6864981 in words is "six million, eight hundred sixty-four thousand, nine hundred eighty-one".