9996691 has 4 divisors (see below), whose sum is σ = 10003384. Its totient is φ = 9990000.

The previous prime is 9996673. The next prime is 9996703. The reversal of 9996691 is 1966999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9996691 - 2⁵ = 9996659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9996631) 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, 31 + ... + 4471.

It is an arithmetic number, because the mean of its divisors is an integer number (2500846).

Almost surely, 2^9996691 is an apocalyptic number.

9996691 is a deficient number, since it is larger than the sum of its proper divisors (6693).

9996691 is a wasteful number, since it uses less digits than its factorization.

9996691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6692.

The product of its digits is 236196, while the sum is 49.

The square root of 9996691 is about 3161.7544180407. The cubic root of 9996691 is about 215.4197029670.

The spelling of 9996691 in words is "nine million, nine hundred ninety-six thousand, six hundred ninety-one".