9956689 has 4 divisors (see below), whose sum is σ = 10093156. Its totient is φ = 9820224.

The previous prime is 9956641. The next prime is 9956699. The reversal of 9956689 is 9866599.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7290000 + 2666689 = 2700^2 + 1633^2 .

It is a cyclic number.

It is not a de Polignac number, because 9956689 - 2⁷ = 9956561 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9956699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68124 + ... + 68269.

It is an arithmetic number, because the mean of its divisors is an integer number (2523289).

Almost surely, 2^9956689 is an apocalyptic number.

It is an amenable number.

9956689 is a deficient number, since it is larger than the sum of its proper divisors (136467).

9956689 is a wasteful number, since it uses less digits than its factorization.

9956689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136466.

The product of its digits is 1049760, while the sum is 52.

The square root of 9956689 is about 3155.4221587610. The cubic root of 9956689 is about 215.1319831411.

The spelling of 9956689 in words is "nine million, nine hundred fifty-six thousand, six hundred eighty-nine".