2983681 has 2 divisors, whose sum is σ = 2983682. Its totient is φ = 2983680.

The previous prime is 2983679. The next prime is 2983697. The reversal of 2983681 is 1863892.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2958400 + 25281 = 1720^2 + 159^2 .

It is a cyclic number.

It is not a de Polignac number, because 2983681 - 2¹ = 2983679 is a prime.

It is a super-2 number, since 2×2983681² = 17804704619522, which contains 22 as substring.

Together with 2983679, it forms a pair of twin primes.

It is a Chen prime.

2983681 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2983681.

It is not a weakly prime, because it can be changed into another prime (2983621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1491840 + 1491841.

It is an arithmetic number, because the mean of its divisors is an integer number (1491841).

2^2983681 is an apocalyptic number.

It is an amenable number.

2983681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2983681 is an equidigital number, since it uses as much as digits as its factorization.

2983681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 2983681 is about 1727.3334941464. Note that the first 3 decimals coincide. The cubic root of 2983681 is about 143.9629695163.

The spelling of 2983681 in words is "two million, nine hundred eighty-three thousand, six hundred eighty-one".