991696449 has 8 divisors (see below), whose sum is σ = 1325095200. Its totient is φ = 659714336.

The previous prime is 991696439. The next prime is 991696457. The reversal of 991696449 is 944696199.

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 991696449 - 2¹¹ = 991694401 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (991696429) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 352524 + ... + 355325.

It is an arithmetic number, because the mean of its divisors is an integer number (165636900).

Almost surely, 2^991696449 is an apocalyptic number.

It is an amenable number.

991696449 is a deficient number, since it is larger than the sum of its proper divisors (333398751).

991696449 is a wasteful number, since it uses less digits than its factorization.

991696449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708319.

The product of its digits is 3779136, while the sum is 57.

The square root of 991696449 is about 31491.2122504041. The cubic root of 991696449 is about 997.2244531335.

The spelling of 991696449 in words is "nine hundred ninety-one million, six hundred ninety-six thousand, four hundred forty-nine".