91213411 has 2 divisors, whose sum is σ = 91213412. Its totient is φ = 91213410.

The previous prime is 91213393. The next prime is 91213453. The reversal of 91213411 is 11431219.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91213411 - 2⁵ = 91213379 is a prime.

It is not a weakly prime, because it can be changed into another prime (91213711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45606705 + 45606706.

It is an arithmetic number, because the mean of its divisors is an integer number (45606706).

Almost surely, 2^91213411 is an apocalyptic number.

91213411 is a deficient number, since it is larger than the sum of its proper divisors (1).

91213411 is an equidigital number, since it uses as much as digits as its factorization.

91213411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 22.

The square root of 91213411 is about 9550.5712394600. The cubic root of 91213411 is about 450.1454854696.

The spelling of 91213411 in words is "ninety-one million, two hundred thirteen thousand, four hundred eleven".