9855959 has 2 divisors, whose sum is σ = 9855960. Its totient is φ = 9855958.

The previous prime is 9855943. The next prime is 9855977. The reversal of 9855959 is 9595589.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9855959 - 2⁴ = 9855943 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 (9855929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4927979 + 4927980.

It is an arithmetic number, because the mean of its divisors is an integer number (4927980).

Almost surely, 2^9855959 is an apocalyptic number.

9855959 is a deficient number, since it is larger than the sum of its proper divisors (1).

9855959 is an equidigital number, since it uses as much as digits as its factorization.

9855959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 729000, while the sum is 50.

The square root of 9855959 is about 3139.4201693943. The cubic root of 9855959 is about 214.4040391378.

The spelling of 9855959 in words is "nine million, eight hundred fifty-five thousand, nine hundred fifty-nine".