4363981 has 2 divisors, whose sum is σ = 4363982. Its totient is φ = 4363980.

The previous prime is 4363979. The next prime is 4364011. The reversal of 4363981 is 1893634.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3006756 + 1357225 = 1734^2 + 1165^2 .

It is a cyclic number.

It is not a de Polignac number, because 4363981 - 2¹ = 4363979 is a prime.

It is a super-2 number, since 2×4363981² = 38088660336722, which contains 22 as substring.

Together with 4363979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4366981) 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, 2181990 + 2181991.

It is an arithmetic number, because the mean of its divisors is an integer number (2181991).

Almost surely, 2^4363981 is an apocalyptic number.

It is an amenable number.

4363981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4363981 is an equidigital number, since it uses as much as digits as its factorization.

4363981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 4363981 is about 2089.0143608889. The cubic root of 4363981 is about 163.4158900524.

The spelling of 4363981 in words is "four million, three hundred sixty-three thousand, nine hundred eighty-one".