91143158 has 16 divisors (see below), whose sum is σ = 142871040. Its totient is φ = 43525416.

The previous prime is 91143121. The next prime is 91143163. The reversal of 91143158 is 85134119.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46841 + ... + 48747.

It is an arithmetic number, because the mean of its divisors is an integer number (8929440).

Almost surely, 2^91143158 is an apocalyptic number.

91143158 is a deficient number, since it is larger than the sum of its proper divisors (51727882).

91143158 is a wasteful number, since it uses less digits than its factorization.

91143158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2971.

The product of its digits is 4320, while the sum is 32.

The square root of 91143158 is about 9546.8925834535. The cubic root of 91143158 is about 450.0298877268.

The spelling of 91143158 in words is "ninety-one million, one hundred forty-three thousand, one hundred fifty-eight".