99891048193 has 4 divisors (see below), whose sum is σ = 99891734868. Its totient is φ = 99890361520.

The previous prime is 99891048091. The next prime is 99891048199. The reversal of 99891048193 is 39184019899.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 33170608384 + 66720439809 = 182128^2 + 258303^2 .

It is a cyclic number.

It is not a de Polignac number, because 99891048193 - 2¹³ = 99891040001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99891048199) 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, 29518 + ... + 447943.

It is an arithmetic number, because the mean of its divisors is an integer number (24972933717).

Almost surely, 2^99891048193 is an apocalyptic number.

It is an amenable number.

99891048193 is a deficient number, since it is larger than the sum of its proper divisors (686675).

99891048193 is a wasteful number, since it uses less digits than its factorization.

99891048193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686674.

The product of its (nonzero) digits is 5038848, while the sum is 61.

The spelling of 99891048193 in words is "ninety-nine billion, eight hundred ninety-one million, forty-eight thousand, one hundred ninety-three".