91224283 has 2 divisors, whose sum is σ = 91224284. Its totient is φ = 91224282.

The previous prime is 91224281. The next prime is 91224317. The reversal of 91224283 is 38242219.

It is a weak prime.

It is an emirp because it is prime and its reverse (38242219) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91224283 - 2¹ = 91224281 is a prime.

Together with 91224281, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (91224281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45612141 + 45612142.

It is an arithmetic number, because the mean of its divisors is an integer number (45612142).

Almost surely, 2^91224283 is an apocalyptic number.

91224283 is a deficient number, since it is larger than the sum of its proper divisors (1).

91224283 is an equidigital number, since it uses as much as digits as its factorization.

91224283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 91224283 is about 9551.1404031142. The cubic root of 91224283 is about 450.1633694892.

The spelling of 91224283 in words is "ninety-one million, two hundred twenty-four thousand, two hundred eighty-three".