991082141 has 8 divisors (see below), whose sum is σ = 1135580160. Its totient is φ = 847312848.

The previous prime is 991082137. The next prime is 991082143. The reversal of 991082141 is 141280199.

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

It is a cyclic number.

It is not a de Polignac number, because 991082141 - 2² = 991082137 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991082143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179261 + ... + 184706.

It is an arithmetic number, because the mean of its divisors is an integer number (141947520).

Almost surely, 2^991082141 is an apocalyptic number.

It is an amenable number.

991082141 is a deficient number, since it is larger than the sum of its proper divisors (144498019).

991082141 is a wasteful number, since it uses less digits than its factorization.

991082141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364363.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 991082141 is about 31481.4570977901. The cubic root of 991082141 is about 997.0184998246.

The spelling of 991082141 in words is "nine hundred ninety-one million, eighty-two thousand, one hundred forty-one".