91349289 has 12 divisors (see below), whose sum is σ = 136836336. Its totient is φ = 60899364.

The previous prime is 91349267. The next prime is 91349299. The reversal of 91349289 is 98294319.

It is not a de Polignac number, because 91349289 - 2⁷ = 91349161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91349299) 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 11 ways as a sum of consecutive naturals, for example, 187719 + ... + 188204.

It is an arithmetic number, because the mean of its divisors is an integer number (11403028).

Almost surely, 2^91349289 is an apocalyptic number.

It is an amenable number.

91349289 is a deficient number, since it is larger than the sum of its proper divisors (45487047).

91349289 is an equidigital number, since it uses as much as digits as its factorization.

91349289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375938 (or 375926 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 91349289 is about 9557.6821981064. The cubic root of 91349289 is about 450.3688975054.

The spelling of 91349289 in words is "ninety-one million, three hundred forty-nine thousand, two hundred eighty-nine".