91106 has 4 divisors (see below), whose sum is σ = 136662. Its totient is φ = 45552.

The previous prime is 91099. The next prime is 91121. The reversal of 91106 is 60119.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60119 = 79 ⋅761.

It can be written as a sum of positive squares in only one way, i.e., 67081 + 24025 = 259^2 + 155^2 .

It is an unprimeable number.

91106 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22775 + ... + 22778.

2⁹¹¹⁰⁶ is an apocalyptic number.

91106 is a deficient number, since it is larger than the sum of its proper divisors (45556).

91106 is a wasteful number, since it uses less digits than its factorization.

91106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45555.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 91106 is about 301.8377047355. The cubic root of 91106 is about 44.9968722106.

The spelling of 91106 in words is "ninety-one thousand, one hundred six".