99071 has 4 divisors (see below), whose sum is σ = 113232. Its totient is φ = 84912.

The previous prime is 99053. The next prime is 99079. The reversal of 99071 is 17099.

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

It is a cyclic number.

It is not a de Polignac number, because 99071 - 2¹⁰ = 98047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7070 + ... + 7083.

It is an arithmetic number, because the mean of its divisors is an integer number (28308).

2⁹⁹⁰⁷¹ is an apocalyptic number.

99071 is a deficient number, since it is larger than the sum of its proper divisors (14161).

99071 is a wasteful number, since it uses less digits than its factorization.

99071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14160.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 99071 is about 314.7554606357. The cubic root of 99071 is about 46.2717063924.

The spelling of 99071 in words is "ninety-nine thousand, seventy-one".