5633981 has 2 divisors, whose sum is σ = 5633982. Its totient is φ = 5633980.

The previous prime is 5633977. The next prime is 5634001. The reversal of 5633981 is 1893365.

5633981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5331481 + 302500 = 2309^2 + 550^2 .

It is a cyclic number.

It is not a de Polignac number, because 5633981 - 2² = 5633977 is a prime.

It is a super-2 number, since 2×5633981² = 63483483816722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5632981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2816990 + 2816991.

It is an arithmetic number, because the mean of its divisors is an integer number (2816991).

Almost surely, 2^5633981 is an apocalyptic number.

It is an amenable number.

5633981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5633981 is an equidigital number, since it uses as much as digits as its factorization.

5633981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 35.

The square root of 5633981 is about 2373.6008510278. The cubic root of 5633981 is about 177.9392651438.

The spelling of 5633981 in words is "five million, six hundred thirty-three thousand, nine hundred eighty-one".