6443081 has 2 divisors, whose sum is σ = 6443082. Its totient is φ = 6443080.

The previous prime is 6443011. The next prime is 6443083. The reversal of 6443081 is 1803446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6150400 + 292681 = 2480^2 + 541^2 .

It is a cyclic number.

It is not a de Polignac number, because 6443081 - 2¹⁰ = 6442057 is a prime.

It is a super-2 number, since 2×6443081² = 83026585545122, which contains 22 as substring.

Together with 6443083, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6443081.

It is not a weakly prime, because it can be changed into another prime (6443083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3221540 + 3221541.

It is an arithmetic number, because the mean of its divisors is an integer number (3221541).

Almost surely, 2^6443081 is an apocalyptic number.

It is an amenable number.

6443081 is a deficient number, since it is larger than the sum of its proper divisors (1).

6443081 is an equidigital number, since it uses as much as digits as its factorization.

6443081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 6443081 is about 2538.3224775430. The cubic root of 6443081 is about 186.0792143418.

The spelling of 6443081 in words is "six million, four hundred forty-three thousand, eighty-one".