991147468 has 12 divisors (see below), whose sum is σ = 1771412832. Its totient is φ = 485029520.

The previous prime is 991147429. The next prime is 991147477. The reversal of 991147468 is 864741199.

It is a super-2 number, since 2×991147468² = 1964746606645622048, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2635843 + ... + 2636218.

It is an arithmetic number, because the mean of its divisors is an integer number (147617736).

Almost surely, 2^991147468 is an apocalyptic number.

It is an amenable number.

991147468 is a deficient number, since it is larger than the sum of its proper divisors (780265364).

991147468 is a wasteful number, since it uses less digits than its factorization.

991147468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5272112 (or 5272110 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The square root of 991147468 is about 31482.4946279675. The cubic root of 991147468 is about 997.0404054413.

The spelling of 991147468 in words is "nine hundred ninety-one million, one hundred forty-seven thousand, four hundred sixty-eight".