8639441 has 2 divisors, whose sum is σ = 8639442. Its totient is φ = 8639440.

The previous prime is 8639413. The next prime is 8639443. The reversal of 8639441 is 1449368.

8639441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8410000 + 229441 = 2900^2 + 479^2 .

It is a cyclic number.

It is not a de Polignac number, because 8639441 - 2¹⁸ = 8377297 is a prime.

It is a Sophie Germain prime.

Together with 8639443, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8639443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4319720 + 4319721.

It is an arithmetic number, because the mean of its divisors is an integer number (4319721).

Almost surely, 2^8639441 is an apocalyptic number.

It is an amenable number.

8639441 is a deficient number, since it is larger than the sum of its proper divisors (1).

8639441 is an equidigital number, since it uses as much as digits as its factorization.

8639441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 8639441 is about 2939.2926019708. The cubic root of 8639441 is about 205.1926881513.

The spelling of 8639441 in words is "eight million, six hundred thirty-nine thousand, four hundred forty-one".