991333122 has 32 divisors (see below), whose sum is σ = 2137894080. Its totient is φ = 304637760.

The previous prime is 991333117. The next prime is 991333141. The reversal of 991333122 is 221333199.

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 in 15 ways as a sum of consecutive naturals, for example, 56997 + ... + 72327.

It is an arithmetic number, because the mean of its divisors is an integer number (66809190).

Almost surely, 2^991333122 is an apocalyptic number.

991333122 is an abundant number, since it is smaller than the sum of its proper divisors (1146560958).

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

991333122 is a wasteful number, since it uses less digits than its factorization.

991333122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16178.

The product of its digits is 8748, while the sum is 33.

The square root of 991333122 is about 31485.4430173692. The cubic root of 991333122 is about 997.1026541611.

The spelling of 991333122 in words is "nine hundred ninety-one million, three hundred thirty-three thousand, one hundred twenty-two".