9516991 has 8 divisors (see below), whose sum is σ = 10993104. Its totient is φ = 8142720.

The previous prime is 9516989. The next prime is 9517003. The reversal of 9516991 is 1996159.

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

It is a cyclic number.

It is not a de Polignac number, because 9516991 - 2¹ = 9516989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9516931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25260 + ... + 25633.

It is an arithmetic number, because the mean of its divisors is an integer number (1374138).

Almost surely, 2^9516991 is an apocalyptic number.

9516991 is a deficient number, since it is larger than the sum of its proper divisors (1476113).

9516991 is a wasteful number, since it uses less digits than its factorization.

9516991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50921.

The product of its digits is 21870, while the sum is 40.

The square root of 9516991 is about 3084.9620743212. The cubic root of 9516991 is about 211.9173687107.

The spelling of 9516991 in words is "nine million, five hundred sixteen thousand, nine hundred ninety-one".