4403981 has 2 divisors, whose sum is σ = 4403982. Its totient is φ = 4403980.

The previous prime is 4403963. The next prime is 4403983. The reversal of 4403981 is 1893044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3575881 + 828100 = 1891^2 + 910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4403981 is a prime.

It is a super-2 number, since 2×4403981² = 38790097296722, which contains 22 as substring.

Together with 4403983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4403983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2201990 + 2201991.

It is an arithmetic number, because the mean of its divisors is an integer number (2201991).

Almost surely, 2^4403981 is an apocalyptic number.

It is an amenable number.

4403981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4403981 is an equidigital number, since it uses as much as digits as its factorization.

4403981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 4403981 is about 2098.5664154370. The cubic root of 4403981 is about 163.9136591924.

The spelling of 4403981 in words is "four million, four hundred three thousand, nine hundred eighty-one".