991359122 has 8 divisors (see below), whose sum is σ = 1601426316. Its totient is φ = 457550352.

The previous prime is 991359121. The next prime is 991359151. The reversal of 991359122 is 221953199.

991359122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 982885201 + 8473921 = 31351^2 + 2911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×991359122² = 1965585817545221768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 991359122.

It is not an unprimeable number, because it can be changed into a prime (991359121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19064573 + ... + 19064624.

Almost surely, 2^991359122 is an apocalyptic number.

991359122 is a deficient number, since it is larger than the sum of its proper divisors (610067194).

991359122 is a wasteful number, since it uses less digits than its factorization.

991359122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38129212.

The product of its digits is 43740, while the sum is 41.

The square root of 991359122 is about 31485.8559038817. The cubic root of 991359122 is about 997.1113711913. Note that the first 3 decimals are identical.

The spelling of 991359122 in words is "nine hundred ninety-one million, three hundred fifty-nine thousand, one hundred twenty-two".