91111106 has 4 divisors (see below), whose sum is σ = 136666662. Its totient is φ = 45555552.

The previous prime is 91111093. The next prime is 91111123. The reversal of 91111106 is 60111119.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60111119 = 43 ⋅1397933.

It can be written as a sum of positive squares in only one way, i.e., 60762025 + 30349081 = 7795^2 + 5509^2 .

It is a super-3 number, since 3×91111106³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22777775 + ... + 22777778.

Almost surely, 2^91111106 is an apocalyptic number.

91111106 is a deficient number, since it is larger than the sum of its proper divisors (45555556).

91111106 is a wasteful number, since it uses less digits than its factorization.

91111106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45555555.

The product of its (nonzero) digits is 54, while the sum is 20.

The square root of 91111106 is about 9545.2137744526. The cubic root of 91111106 is about 449.9771280556.

The spelling of 91111106 in words is "ninety-one million, one hundred eleven thousand, one hundred six".