91111116 has 24 divisors (see below), whose sum is σ = 214023600. Its totient is φ = 30165952.

The previous prime is 91111093. The next prime is 91111123. The reversal of 91111116 is 61111119.

91111116 is a strobogrammatic number because it is the same when read upside-down.

It is a junction number, because it is equal to n+sod(n) for n = 91111092 and 91111101.

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, 23691 + ... + 27266.

It is an arithmetic number, because the mean of its divisors is an integer number (8917650).

Almost surely, 2^91111116 is an apocalyptic number.

It is an amenable number.

91111116 is an abundant number, since it is smaller than the sum of its proper divisors (122912484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91111116 is a wasteful number, since it uses less digits than its factorization.

91111116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51113 (or 51111 counting only the distinct ones).

The product of its digits is 54, while the sum is 21.

The square root of 91111116 is about 9545.2142982753. The cubic root of 91111116 is about 449.9771445182.

The spelling of 91111116 in words is "ninety-one million, one hundred eleven thousand, one hundred sixteen".