91243 has 2 divisors, whose sum is σ = 91244. Its totient is φ = 91242.

The previous prime is 91237. The next prime is 91249. The reversal of 91243 is 34219.

It is a balanced prime because it is at equal distance from previous prime (91237) and next prime (91249).

It is a cyclic number.

It is not a de Polignac number, because 91243 - 2⁹ = 90731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91243.

It is not a weakly prime, because it can be changed into another prime (91249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45621 + 45622.

It is an arithmetic number, because the mean of its divisors is an integer number (45622).

2⁹¹²⁴³ is an apocalyptic number.

91243 is a deficient number, since it is larger than the sum of its proper divisors (1).

91243 is an equidigital number, since it uses as much as digits as its factorization.

91243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 91243 is about 302.0645626352. The cubic root of 91243 is about 45.0194154902.

It can be divided in two parts, 9124 and 3, that multiplied together give a palindrome (27372).

The spelling of 91243 in words is "ninety-one thousand, two hundred forty-three".