2027681 has 2 divisors, whose sum is σ = 2027682. Its totient is φ = 2027680.

The previous prime is 2027677. The next prime is 2027713. The reversal of 2027681 is 1867202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1915456 + 112225 = 1384^2 + 335^2 .

It is a cyclic number.

It is not a de Polignac number, because 2027681 - 2² = 2027677 is a prime.

It is a super-2 number, since 2×2027681² = 8222980475522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2027681.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2017681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1013840 + 1013841.

It is an arithmetic number, because the mean of its divisors is an integer number (1013841).

2^2027681 is an apocalyptic number.

It is an amenable number.

2027681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2027681 is an equidigital number, since it uses as much as digits as its factorization.

2027681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 2027681 is about 1423.9666428677. The cubic root of 2027681 is about 126.5707083331.

The spelling of 2027681 in words is "two million, twenty-seven thousand, six hundred eighty-one".