2086981 has 12 divisors (see below), whose sum is σ = 2312388. Its totient is φ = 1881984.

The previous prime is 2086969. The next prime is 2087011. The reversal of 2086981 is 1896802.

It can be written as a sum of positive squares in 6 ways, for example, as 370881 + 1716100 = 609^2 + 1310^2 .

It is not a de Polignac number, because 2086981 - 2⁵ = 2086949 is a prime.

It is a super-2 number, since 2×2086981² = 8710979388722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2086901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8841 + ... + 9073.

It is an arithmetic number, because the mean of its divisors is an integer number (192699).

2^2086981 is an apocalyptic number.

It is an amenable number.

2086981 is a deficient number, since it is larger than the sum of its proper divisors (225407).

2086981 is a wasteful number, since it uses less digits than its factorization.

2086981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 2086981 is about 1444.6387091588. The cubic root of 2086981 is about 127.7927350411.

The spelling of 2086981 in words is "two million, eighty-six thousand, nine hundred eighty-one".