9996905 has 8 divisors (see below), whose sum is σ = 12015432. Its totient is φ = 7984768.

The previous prime is 9996887. The next prime is 9996929. The reversal of 9996905 is 5096999.

It can be written as a sum of positive squares in 4 ways, for example, as 2274064 + 7722841 = 1508^2 + 2779^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9996905 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9996905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3119 + ... + 5451.

It is an arithmetic number, because the mean of its divisors is an integer number (1501929).

Almost surely, 2^9996905 is an apocalyptic number.

It is an amenable number.

9996905 is a deficient number, since it is larger than the sum of its proper divisors (2018527).

9996905 is a wasteful number, since it uses less digits than its factorization.

9996905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3195.

The product of its (nonzero) digits is 196830, while the sum is 47.

The square root of 9996905 is about 3161.7882598302. The cubic root of 9996905 is about 215.4212401252.

It can be divided in two parts, 9996 and 905, that added together give a palindrome (10901).

The spelling of 9996905 in words is "nine million, nine hundred ninety-six thousand, nine hundred five".