9912817 has 4 divisors (see below), whose sum is σ = 10123776. Its totient is φ = 9701860.

The previous prime is 9912803. The next prime is 9912829. The reversal of 9912817 is 7182199.

9912817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7182199 = 67 ⋅107197.

It is a cyclic number.

It is not a de Polignac number, because 9912817 - 2⁷ = 9912689 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 (9912017) 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, 105409 + ... + 105502.

It is an arithmetic number, because the mean of its divisors is an integer number (2530944).

Almost surely, 2^9912817 is an apocalyptic number.

It is an amenable number.

9912817 is a deficient number, since it is larger than the sum of its proper divisors (210959).

9912817 is a wasteful number, since it uses less digits than its factorization.

9912817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210958.

The product of its digits is 9072, while the sum is 37.

The square root of 9912817 is about 3148.4626407185. The cubic root of 9912817 is about 214.8155403636.

The spelling of 9912817 in words is "nine million, nine hundred twelve thousand, eight hundred seventeen".