9664871 has 2 divisors, whose sum is σ = 9664872. Its totient is φ = 9664870.

The previous prime is 9664867. The next prime is 9664873. The reversal of 9664871 is 1784669.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9664871 - 2² = 9664867 is a prime.

Together with 9664873, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9664873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4832435 + 4832436.

It is an arithmetic number, because the mean of its divisors is an integer number (4832436).

Almost surely, 2^9664871 is an apocalyptic number.

9664871 is a deficient number, since it is larger than the sum of its proper divisors (1).

9664871 is an equidigital number, since it uses as much as digits as its factorization.

9664871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 9664871 is about 3108.8375641066. The cubic root of 9664871 is about 213.0093598714.

The spelling of 9664871 in words is "nine million, six hundred sixty-four thousand, eight hundred seventy-one".