91148243 has 2 divisors, whose sum is σ = 91148244. Its totient is φ = 91148242.

The previous prime is 91148231. The next prime is 91148257. The reversal of 91148243 is 34284119.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91148243 - 2⁶ = 91148179 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91148293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45574121 + 45574122.

It is an arithmetic number, because the mean of its divisors is an integer number (45574122).

Almost surely, 2^91148243 is an apocalyptic number.

91148243 is a deficient number, since it is larger than the sum of its proper divisors (1).

91148243 is an equidigital number, since it uses as much as digits as its factorization.

91148243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 91148243 is about 9547.1588967609. The cubic root of 91148243 is about 450.0382568298.

The spelling of 91148243 in words is "ninety-one million, one hundred forty-eight thousand, two hundred forty-three".