2006981 has 4 divisors (see below), whose sum is σ = 2022912. Its totient is φ = 1991052.

The previous prime is 2006959. The next prime is 2007001. The reversal of 2006981 is 1896002.

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 2006981 - 2¹⁰ = 2005957 is a prime.

It is a super-2 number, since 2×2006981² = 8055945468722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2006981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005981) 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, 7775 + ... + 8028.

It is an arithmetic number, because the mean of its divisors is an integer number (505728).

2^2006981 is an apocalyptic number.

It is an amenable number.

2006981 is a deficient number, since it is larger than the sum of its proper divisors (15931).

2006981 is a wasteful number, since it uses less digits than its factorization.

2006981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15930.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 2006981 is about 1416.6795685687. The cubic root of 2006981 is about 126.1385265740.

The spelling of 2006981 in words is "two million, six thousand, nine hundred eighty-one".