991064068 has 12 divisors (see below), whose sum is σ = 1734641692. Its totient is φ = 495452160.

The previous prime is 991064029. The next prime is 991064077. The reversal of 991064068 is 860460199.

It can be written as a sum of positive squares in 2 ways, for example, as 473410564 + 517653504 = 21758^2 + 22752^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14596 + ... + 46852.

Almost surely, 2^991064068 is an apocalyptic number.

It is an amenable number.

991064068 is a deficient number, since it is larger than the sum of its proper divisors (743577624).

991064068 is a wasteful number, since it uses less digits than its factorization.

991064068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39942 (or 39940 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 991064068 is about 31481.1700544945. The cubic root of 991064068 is about 997.0124393700.

The spelling of 991064068 in words is "nine hundred ninety-one million, sixty-four thousand, sixty-eight".