9959689 has 2 divisors, whose sum is σ = 9959690. Its totient is φ = 9959688.

The previous prime is 9959687. The next prime is 9959699. The reversal of 9959689 is 9869599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8732025 + 1227664 = 2955^2 + 1108^2 .

It is a cyclic number.

It is not a de Polignac number, because 9959689 - 2¹ = 9959687 is a prime.

Together with 9959687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9959683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4979844 + 4979845.

It is an arithmetic number, because the mean of its divisors is an integer number (4979845).

Almost surely, 2^9959689 is an apocalyptic number.

It is an amenable number.

9959689 is a deficient number, since it is larger than the sum of its proper divisors (1).

9959689 is an equidigital number, since it uses as much as digits as its factorization.

9959689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1574640, while the sum is 55.

The square root of 9959689 is about 3155.8974951668. The cubic root of 9959689 is about 215.1535877508.

It can be divided in two parts, 9959 and 689, that added together give a cube (10648 = 22³).

The spelling of 9959689 in words is "nine million, nine hundred fifty-nine thousand, six hundred eighty-nine".