8643959 has 2 divisors, whose sum is σ = 8643960. Its totient is φ = 8643958.

The previous prime is 8643953. The next prime is 8643991. The reversal of 8643959 is 9593468.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8643959 - 2¹² = 8639863 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8643953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4321979 + 4321980.

It is an arithmetic number, because the mean of its divisors is an integer number (4321980).

Almost surely, 2^8643959 is an apocalyptic number.

8643959 is a deficient number, since it is larger than the sum of its proper divisors (1).

8643959 is an equidigital number, since it uses as much as digits as its factorization.

8643959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 44.

The square root of 8643959 is about 2940.0610537878. The cubic root of 8643959 is about 205.2284504578.

The spelling of 8643959 in words is "eight million, six hundred forty-three thousand, nine hundred fifty-nine".