2036981 has 4 divisors (see below), whose sum is σ = 2040000. Its totient is φ = 2033964.

The previous prime is 2036977. The next prime is 2036987. The reversal of 2036981 is 1896302.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1896302 = 2 ⋅948151.

It is a cyclic number.

It is not a de Polignac number, because 2036981 - 2² = 2036977 is a prime.

It is a super-2 number, since 2×2036981² = 8298583188722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2036987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20 + ... + 2018.

It is an arithmetic number, because the mean of its divisors is an integer number (510000).

2^2036981 is an apocalyptic number.

It is an amenable number.

2036981 is a deficient number, since it is larger than the sum of its proper divisors (3019).

2036981 is a wasteful number, since it uses less digits than its factorization.

2036981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3018.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 2036981 is about 1427.2284330127. The cubic root of 2036981 is about 126.7639196173.

The spelling of 2036981 in words is "two million, thirty-six thousand, nine hundred eighty-one".