2090981 has 8 divisors (see below), whose sum is σ = 2217984. Its totient is φ = 1967760.

The previous prime is 2090951. The next prime is 2090989. The reversal of 2090981 is 1890902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2090981 is a prime.

It is a super-2 number, since 2×2090981² = 8744403084722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2090989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236 + ... + 2058.

It is an arithmetic number, because the mean of its divisors is an integer number (277248).

2^2090981 is an apocalyptic number.

It is an amenable number.

2090981 is a deficient number, since it is larger than the sum of its proper divisors (127003).

2090981 is a wasteful number, since it uses less digits than its factorization.

2090981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 2090981 is about 1446.0224756206. The cubic root of 2090981 is about 127.8743273363.

The spelling of 2090981 in words is "two million, ninety thousand, nine hundred eighty-one".