91108 has 6 divisors (see below), whose sum is σ = 159446. Its totient is φ = 45552.

The previous prime is 91099. The next prime is 91121. The reversal of 91108 is 80119.

It can be written as a sum of positive squares in only one way, i.e., 88804 + 2304 = 298^2 + 48^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11385 + ... + 11392.

2⁹¹¹⁰⁸ is an apocalyptic number.

It is an amenable number.

91108 is a deficient number, since it is larger than the sum of its proper divisors (68338).

91108 is a wasteful number, since it uses less digits than its factorization.

91108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22781 (or 22779 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 91108 is about 301.8410177560. The cubic root of 91108 is about 44.9972014721.

The spelling of 91108 in words is "ninety-one thousand, one hundred eight".