991325132 has 12 divisors (see below), whose sum is σ = 1982650320. Its totient is φ = 424853616.

The previous prime is 991325123. The next prime is 991325143. The reversal of 991325132 is 231523199.

991325132 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 991325092 and 991325101.

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, 17702207 + ... + 17702262.

It is an arithmetic number, because the mean of its divisors is an integer number (165220860).

Almost surely, 2^991325132 is an apocalyptic number.

It is an amenable number.

991325132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

991325132 is a wasteful number, since it uses less digits than its factorization.

991325132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35404480 (or 35404478 counting only the distinct ones).

The product of its digits is 14580, while the sum is 35.

The square root of 991325132 is about 31485.3161330802. The cubic root of 991325132 is about 997.0999753201.

It can be divided in two parts, 99 and 1325132, that added together give a palindrome (1325231).

The spelling of 991325132 in words is "nine hundred ninety-one million, three hundred twenty-five thousand, one hundred thirty-two".