2000981 has 4 divisors (see below), whose sum is σ = 2020512. Its totient is φ = 1981452.

The previous prime is 2000969. The next prime is 2000989. The reversal of 2000981 is 1890002.

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.

It is a cyclic number.

It is not a de Polignac number, because 2000981 - 2¹⁰ = 1999957 is a prime.

It is a super-3 number, since 3×2000981³ = 24035333325330228423, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000989) 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, 9611 + ... + 9816.

It is an arithmetic number, because the mean of its divisors is an integer number (505128).

2^2000981 is an apocalyptic number.

It is an amenable number.

2000981 is a deficient number, since it is larger than the sum of its proper divisors (19531).

2000981 is a wasteful number, since it uses less digits than its factorization.

2000981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19530.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 2000981 is about 1414.5603557289. The cubic root of 2000981 is about 126.0127013315.

Adding to 2000981 its reverse (1890002), we get a palindrome (3890983).

The spelling of 2000981 in words is "two million, nine hundred eighty-one", and thus it is an aban number.