91122443 has 2 divisors, whose sum is σ = 91122444. Its totient is φ = 91122442.

The previous prime is 91122439. The next prime is 91122487. The reversal of 91122443 is 34422119.

It is a weak prime.

It is an emirp because it is prime and its reverse (34422119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91122443 - 2² = 91122439 is a prime.

It is not a weakly prime, because it can be changed into another prime (91122413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45561221 + 45561222.

It is an arithmetic number, because the mean of its divisors is an integer number (45561222).

Almost surely, 2^91122443 is an apocalyptic number.

91122443 is a deficient number, since it is larger than the sum of its proper divisors (1).

91122443 is an equidigital number, since it uses as much as digits as its factorization.

91122443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 91122443 is about 9545.8076138167. The cubic root of 91122443 is about 449.9957909071.

The spelling of 91122443 in words is "ninety-one million, one hundred twenty-two thousand, four hundred forty-three".