2030681 has 4 divisors (see below), whose sum is σ = 2038500. Its totient is φ = 2022864.

The previous prime is 2030669. The next prime is 2030683. The reversal of 2030681 is 1860302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 855625 + 1175056 = 925^2 + 1084^2 .

It is a cyclic number.

It is not a de Polignac number, because 2030681 - 2⁶ = 2030617 is a prime.

It is a super-2 number, since 2×2030681² = 8247330647522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2030683) 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, 3506 + ... + 4043.

It is an arithmetic number, because the mean of its divisors is an integer number (509625).

2^2030681 is an apocalyptic number.

It is an amenable number.

2030681 is a deficient number, since it is larger than the sum of its proper divisors (7819).

2030681 is an equidigital number, since it uses as much as digits as its factorization.

2030681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7818.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2030681 is about 1425.0196489873. The cubic root of 2030681 is about 126.6330989844.

Adding to 2030681 its reverse (1860302), we get a palindrome (3890983).

The spelling of 2030681 in words is "two million, thirty thousand, six hundred eighty-one".