5683981 has 2 divisors, whose sum is σ = 5683982. Its totient is φ = 5683980.

The previous prime is 5683963. The next prime is 5683987. The reversal of 5683981 is 1893865.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5616900 + 67081 = 2370^2 + 259^2 .

It is a cyclic number.

It is not a de Polignac number, because 5683981 - 2⁵ = 5683949 is a prime.

It is a super-2 number, since 2×5683981² = 64615280016722, which contains 22 as substring.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5683987) 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 as a sum of consecutive naturals, namely, 2841990 + 2841991.

It is an arithmetic number, because the mean of its divisors is an integer number (2841991).

Almost surely, 2^5683981 is an apocalyptic number.

It is an amenable number.

5683981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5683981 is an equidigital number, since it uses as much as digits as its factorization.

5683981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 5683981 is about 2384.1101065177. The cubic root of 5683981 is about 178.4641026082.

The spelling of 5683981 in words is "five million, six hundred eighty-three thousand, nine hundred eighty-one".