9891716 has 6 divisors (see below), whose sum is σ = 17310510. Its totient is φ = 4945856.

The previous prime is 9891709. The next prime is 9891731. The reversal of 9891716 is 6171989.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7182400 + 2709316 = 2680^2 + 1646^2 .

It is an unprimeable number.

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, 1236461 + ... + 1236468.

It is an arithmetic number, because the mean of its divisors is an integer number (2885085).

Almost surely, 2^9891716 is an apocalyptic number.

It is an amenable number.

9891716 is a deficient number, since it is larger than the sum of its proper divisors (7418794).

9891716 is a wasteful number, since it uses less digits than its factorization.

9891716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472933 (or 2472931 counting only the distinct ones).

The product of its digits is 27216, while the sum is 41.

The square root of 9891716 is about 3145.1098549971. The cubic root of 9891716 is about 214.6630091237.

The spelling of 9891716 in words is "nine million, eight hundred ninety-one thousand, seven hundred sixteen".