90143 has 4 divisors (see below), whose sum is σ = 91080. Its totient is φ = 89208.

The previous prime is 90127. The next prime is 90149. The reversal of 90143 is 34109.

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, and also an emirpimes, since its reverse is a distinct semiprime: 34109 = 23 ⋅1483.

It is a cyclic number.

It is not a de Polignac number, because 90143 - 2⁴ = 90127 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90149) 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, 305 + ... + 522.

It is an arithmetic number, because the mean of its divisors is an integer number (22770).

2⁹⁰¹⁴³ is an apocalyptic number.

90143 is a deficient number, since it is larger than the sum of its proper divisors (937).

90143 is a wasteful number, since it uses less digits than its factorization.

90143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 90143 is about 300.2382387372. The cubic root of 90143 is about 44.8377697533.

The spelling of 90143 in words is "ninety thousand, one hundred forty-three".