8399641 has 2 divisors, whose sum is σ = 8399642. Its totient is φ = 8399640.

The previous prime is 8399627. The next prime is 8399659. The reversal of 8399641 is 1469938.

8399641 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., 4713241 + 3686400 = 2171^2 + 1920^2 .

It is a cyclic number.

It is not a de Polignac number, because 8399641 - 2⁹ = 8399129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8399594 and 8399603.

It is not a weakly prime, because it can be changed into another prime (8399621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4199820 + 4199821.

It is an arithmetic number, because the mean of its divisors is an integer number (4199821).

Almost surely, 2^8399641 is an apocalyptic number.

It is an amenable number.

8399641 is a deficient number, since it is larger than the sum of its proper divisors (1).

8399641 is an equidigital number, since it uses as much as digits as its factorization.

8399641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 40.

The square root of 8399641 is about 2898.2134151922. The cubic root of 8399641 is about 203.2763753988.

The spelling of 8399641 in words is "eight million, three hundred ninety-nine thousand, six hundred forty-one".