6812981 has 4 divisors (see below), whose sum is σ = 7786272. Its totient is φ = 5839692.

The previous prime is 6812959. The next prime is 6812983. The reversal of 6812981 is 1892186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1892186 = 2 ⋅946093.

It is a cyclic number.

It is not a de Polignac number, because 6812981 - 2¹⁴ = 6796597 is a prime.

It is a super-2 number, since 2×6812981² = 92833420212722, 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 (6812983) 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, 486635 + ... + 486648.

It is an arithmetic number, because the mean of its divisors is an integer number (1946568).

Almost surely, 2^6812981 is an apocalyptic number.

It is an amenable number.

6812981 is a deficient number, since it is larger than the sum of its proper divisors (973291).

6812981 is an equidigital number, since it uses as much as digits as its factorization.

6812981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973290.

The product of its digits is 6912, while the sum is 35.

The square root of 6812981 is about 2610.1687684899. The cubic root of 6812981 is about 189.5741246208.

The spelling of 6812981 in words is "six million, eight hundred twelve thousand, nine hundred eighty-one".