991617296 has 20 divisors (see below), whose sum is σ = 2022378000. Its totient is φ = 469713312.

The previous prime is 991617287. The next prime is 991617299. The reversal of 991617296 is 692716199.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (991617299) 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 3 ways as a sum of consecutive naturals, for example, 1630646 + ... + 1631253.

It is an arithmetic number, because the mean of its divisors is an integer number (101118900).

Almost surely, 2^991617296 is an apocalyptic number.

It is an amenable number.

991617296 is an abundant number, since it is smaller than the sum of its proper divisors (1030760704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

991617296 is a wasteful number, since it uses less digits than its factorization.

991617296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3261926 (or 3261920 counting only the distinct ones).

The product of its digits is 367416, while the sum is 50.

The square root of 991617296 is about 31489.9554778980. The cubic root of 991617296 is about 997.1979210204.

The spelling of 991617296 in words is "nine hundred ninety-one million, six hundred seventeen thousand, two hundred ninety-six".