90943 has 4 divisors (see below), whose sum is σ = 91600. Its totient is φ = 90288.
The previous prime is 90931. The next prime is 90947. The reversal of 90943 is 34909.
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: 34909 = 7 ⋅4987.
It is a cyclic number.
It is not a de Polignac number, because 90943 - 25 = 90911 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 (90947) 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, 30 + ... + 427.
It is an arithmetic number, because the mean of its divisors is an integer number (22900).
290943 is an apocalyptic number.
90943 is a deficient number, since it is larger than the sum of its proper divisors (657).
90943 is a wasteful number, since it uses less digits than its factorization.
90943 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 656.
The product of its (nonzero) digits is 972, while the sum is 25.
The square root of 90943 is about 301.5675712009. The cubic root of 90943 is about 44.9700211849.
The spelling of 90943 in words is "ninety thousand, nine hundred forty-three".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.089 sec. • engine limits •