91443 has 16 divisors (see below), whose sum is σ = 141696. Its totient is φ = 51840.

The previous prime is 91433. The next prime is 91453. The reversal of 91443 is 34419.

It is an interprime number because it is at equal distance from previous prime (91433) and next prime (91453).

It is not a de Polignac number, because 91443 - 2⁵ = 91411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480 + ... + 642.

It is an arithmetic number, because the mean of its divisors is an integer number (8856).

2⁹¹⁴⁴³ is an apocalyptic number.

91443 is a deficient number, since it is larger than the sum of its proper divisors (50253).

91443 is a wasteful number, since it uses less digits than its factorization.

91443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194.

The product of its digits is 432, while the sum is 21.

The square root of 91443 is about 302.3954364735. The cubic root of 91443 is about 45.0522849063.

The spelling of 91443 in words is "ninety-one thousand, four hundred forty-three".