991433332 has 6 divisors (see below), whose sum is σ = 1735008338. Its totient is φ = 495716664.

The previous prime is 991433321. The next prime is 991433347. The reversal of 991433332 is 233334199.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 742235536 + 249197796 = 27244^2 + 15786^2 .

It is a junction number, because it is equal to n+sod(n) for n = 991433291 and 991433300.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 123929163 + ... + 123929170.

Almost surely, 2^991433332 is an apocalyptic number.

It is an amenable number.

991433332 is a deficient number, since it is larger than the sum of its proper divisors (743575006).

991433332 is a wasteful number, since it uses less digits than its factorization.

991433332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247858337 (or 247858335 counting only the distinct ones).

The product of its digits is 52488, while the sum is 37.

The square root of 991433332 is about 31487.0343474898. The cubic root of 991433332 is about 997.1362507689.

The spelling of 991433332 in words is "nine hundred ninety-one million, four hundred thirty-three thousand, three hundred thirty-two".