99311 has 4 divisors (see below), whose sum is σ = 101472. Its totient is φ = 97152.

The previous prime is 99289. The next prime is 99317. The reversal of 99311 is 11399.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99311 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99317) 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, 1010 + ... + 1103.

It is an arithmetic number, because the mean of its divisors is an integer number (25368).

2⁹⁹³¹¹ is an apocalyptic number.

99311 is a deficient number, since it is larger than the sum of its proper divisors (2161).

99311 is a wasteful number, since it uses less digits than its factorization.

99311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160.

The product of its digits is 243, while the sum is 23.

The square root of 99311 is about 315.1364783709. The cubic root of 99311 is about 46.3090407423.

The spelling of 99311 in words is "ninety-nine thousand, three hundred eleven".