991165952 has 40 divisors (see below), whose sum is σ = 2263317936. Its totient is φ = 424783872.

The previous prime is 991165949. The next prime is 991165991. The reversal of 991165952 is 259561199.

991165952 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 991165897 and 991165906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134693 + ... + 141860.

Almost surely, 2^991165952 is an apocalyptic number.

It is an amenable number.

991165952 is an abundant number, since it is smaller than the sum of its proper divisors (1272151984).

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

991165952 is an equidigital number, since it uses as much as digits as its factorization.

991165952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276578 (or 276562 counting only the distinct ones).

The product of its digits is 218700, while the sum is 47.

The square root of 991165952 is about 31482.7881865631. The cubic root of 991165952 is about 997.0466033687.

The spelling of 991165952 in words is "nine hundred ninety-one million, one hundred sixty-five thousand, nine hundred fifty-two".