99134841991 has 8 divisors (see below), whose sum is σ = 99243834624. Its totient is φ = 99025912320.

The previous prime is 99134841931. The next prime is 99134842043. The reversal of 99134841991 is 19914843199.

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 99134841991 - 2¹¹ = 99134839943 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 (99134841931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3568531 + ... + 3596203.

It is an arithmetic number, because the mean of its divisors is an integer number (12405479328).

Almost surely, 2^99134841991 is an apocalyptic number.

99134841991 is a deficient number, since it is larger than the sum of its proper divisors (108992633).

99134841991 is a wasteful number, since it uses less digits than its factorization.

99134841991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31481.

The product of its digits is 2519424, while the sum is 58.

The spelling of 99134841991 in words is "ninety-nine billion, one hundred thirty-four million, eight hundred forty-one thousand, nine hundred ninety-one".