91168198 has 16 divisors (see below), whose sum is σ = 149861376. Its totient is φ = 41252040.

The previous prime is 91168169. The next prime is 91168211. The reversal of 91168198 is 89186119.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4386 + ... + 14197.

It is an arithmetic number, because the mean of its divisors is an integer number (9366336).

Almost surely, 2^91168198 is an apocalyptic number.

91168198 is a deficient number, since it is larger than the sum of its proper divisors (58693178).

91168198 is a wasteful number, since it uses less digits than its factorization.

91168198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18819.

The product of its digits is 31104, while the sum is 43.

The square root of 91168198 is about 9548.2039148732. The cubic root of 91168198 is about 450.0710965856.

The spelling of 91168198 in words is "ninety-one million, one hundred sixty-eight thousand, one hundred ninety-eight".