99143 has 4 divisors (see below), whose sum is σ = 108168. Its totient is φ = 90120.

The previous prime is 99139. The next prime is 99149. The reversal of 99143 is 34199.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34199 = 11 ⋅3109.

It is a cyclic number.

It is not a de Polignac number, because 99143 - 2² = 99139 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 (99149) 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, 4496 + ... + 4517.

It is an arithmetic number, because the mean of its divisors is an integer number (27042).

2⁹⁹¹⁴³ is an apocalyptic number.

99143 is a deficient number, since it is larger than the sum of its proper divisors (9025).

99143 is a wasteful number, since it uses less digits than its factorization.

99143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9024.

The product of its digits is 972, while the sum is 26.

The square root of 99143 is about 314.8698143678. The cubic root of 99143 is about 46.2829130224.

It can be divided in two parts, 99 and 143, that added together give a palindrome (242).

The spelling of 99143 in words is "ninety-nine thousand, one hundred forty-three".