91043 has 4 divisors (see below), whose sum is σ = 91728. Its totient is φ = 90360.

The previous prime is 91033. The next prime is 91079. The reversal of 91043 is 34019.

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.

It is a cyclic number.

It is not a de Polignac number, because 91043 - 2⁸ = 90787 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (91033) 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, 71 + ... + 432.

It is an arithmetic number, because the mean of its divisors is an integer number (22932).

2⁹¹⁰⁴³ is an apocalyptic number.

91043 is a deficient number, since it is larger than the sum of its proper divisors (685).

91043 is a wasteful number, since it uses less digits than its factorization.

91043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684.

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

The square root of 91043 is about 301.7333259685. The cubic root of 91043 is about 44.9864980068.

The spelling of 91043 in words is "ninety-one thousand, forty-three".