99641271 has 4 divisors (see below), whose sum is σ = 132855032. Its totient is φ = 66427512.

The previous prime is 99641257. The next prime is 99641291. The reversal of 99641271 is 17214699.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 99641271 - 2⁶ = 99641207 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 (99641291) 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 3 ways as a sum of consecutive naturals, for example, 16606876 + ... + 16606881.

It is an arithmetic number, because the mean of its divisors is an integer number (33213758).

Almost surely, 2^99641271 is an apocalyptic number.

99641271 is a deficient number, since it is larger than the sum of its proper divisors (33213761).

99641271 is a wasteful number, since it uses less digits than its factorization.

99641271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33213760.

The product of its digits is 27216, while the sum is 39.

The square root of 99641271 is about 9982.0474352710. The cubic root of 99641271 is about 463.6031941843.

The spelling of 99641271 in words is "ninety-nine million, six hundred forty-one thousand, two hundred seventy-one".