90043 has 4 divisors (see below), whose sum is σ = 90880. Its totient is φ = 89208.

The previous prime is 90031. The next prime is 90053. The reversal of 90043 is 34009.

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: 34009 = 71 ⋅479.

It is a cyclic number.

It is not a de Polignac number, because 90043 - 2⁵ = 90011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 89999 and 90026.

It is not an unprimeable number, because it can be changed into a prime (90023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228 + ... + 481.

It is an arithmetic number, because the mean of its divisors is an integer number (22720).

2⁹⁰⁰⁴³ is an apocalyptic number.

90043 is a deficient number, since it is larger than the sum of its proper divisors (837).

90043 is a wasteful number, since it uses less digits than its factorization.

90043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 90043 is about 300.0716581085. The cubic root of 90043 is about 44.8211833812.

The spelling of 90043 in words is "ninety thousand, forty-three".