91341221 has 16 divisors (see below), whose sum is σ = 100320768. Its totient is φ = 82790400.

The previous prime is 91341193. The next prime is 91341277. The reversal of 91341221 is 12214319.

It is a cyclic number.

It is not a de Polignac number, because 91341221 - 2¹⁸ = 91079077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91341281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185786 + ... + 186276.

It is an arithmetic number, because the mean of its divisors is an integer number (6270048).

Almost surely, 2^91341221 is an apocalyptic number.

It is an amenable number.

91341221 is a deficient number, since it is larger than the sum of its proper divisors (8979547).

91341221 is a wasteful number, since it uses less digits than its factorization.

91341221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892.

The product of its digits is 432, while the sum is 23.

The square root of 91341221 is about 9557.2601199298. The cubic root of 91341221 is about 450.3556382041.

The spelling of 91341221 in words is "ninety-one million, three hundred forty-one thousand, two hundred twenty-one".