2684981 has 8 divisors (see below), whose sum is σ = 2906904. Its totient is φ = 2465280.

The previous prime is 2684977. The next prime is 2684989. The reversal of 2684981 is 1894862.

2684981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 819025 + 1865956 = 905^2 + 1366^2 .

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 2684981 - 2² = 2684977 is a prime.

It is a super-2 number, since 2×2684981² = 14418245940722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2684989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2705 + ... + 3561.

It is an arithmetic number, because the mean of its divisors is an integer number (363363).

2^2684981 is an apocalyptic number.

It is an amenable number.

2684981 is a deficient number, since it is larger than the sum of its proper divisors (221923).

2684981 is a wasteful number, since it uses less digits than its factorization.

2684981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111.

The product of its digits is 27648, while the sum is 38.

The square root of 2684981 is about 1638.5911631643. The cubic root of 2684981 is about 138.9889921065.

The spelling of 2684981 in words is "two million, six hundred eighty-four thousand, nine hundred eighty-one".