91213348 has 12 divisors (see below), whose sum is σ = 161547120. Its totient is φ = 45057032.

The previous prime is 91213289. The next prime is 91213349. The reversal of 91213348 is 84331219.

It is not an unprimeable number, because it can be changed into a prime (91213349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137038 + ... + 137701.

It is an arithmetic number, because the mean of its divisors is an integer number (13462260).

Almost surely, 2^91213348 is an apocalyptic number.

It is an amenable number.

91213348 is a deficient number, since it is larger than the sum of its proper divisors (70333772).

91213348 is a wasteful number, since it uses less digits than its factorization.

91213348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274826 (or 274824 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 91213348 is about 9550.5679412274. The cubic root of 91213348 is about 450.1453818329.

The spelling of 91213348 in words is "ninety-one million, two hundred thirteen thousand, three hundred forty-eight".