991831352 has 8 divisors (see below), whose sum is σ = 1859683800. Its totient is φ = 495915672.

The previous prime is 991831343. The next prime is 991831367. The reversal of 991831352 is 253138199.

991831352 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61989452 + ... + 61989467.

It is an arithmetic number, because the mean of its divisors is an integer number (232460475).

Almost surely, 2^991831352 is an apocalyptic number.

It is an amenable number.

991831352 is a deficient number, since it is larger than the sum of its proper divisors (867852448).

991831352 is a wasteful number, since it uses less digits than its factorization.

991831352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123978925 (or 123978921 counting only the distinct ones).

The product of its digits is 58320, while the sum is 41.

The square root of 991831352 is about 31493.3540925701. The cubic root of 991831352 is about 997.2696694128.

The spelling of 991831352 in words is "nine hundred ninety-one million, eight hundred thirty-one thousand, three hundred fifty-two".