91016 has 16 divisors (see below), whose sum is σ = 176640. Its totient is φ = 43920.

The previous prime is 91009. The next prime is 91019. The reversal of 91016 is 61019.

91016 is nontrivially palindromic in base 14.

91016 is a strobogrammatic number because it is the same when read upside-down.

91016 is an undulating number in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 90985 and 91003.

It is not an unprimeable number, because it can be changed into a prime (91019) by changing a digit.

91016 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65 + ... + 431.

It is an arithmetic number, because the mean of its divisors is an integer number (11040).

2⁹¹⁰¹⁶ is an apocalyptic number.

It is an amenable number.

91016 is a deficient number, since it is larger than the sum of its proper divisors (85624).

91016 is a wasteful number, since it uses less digits than its factorization.

91016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 400 counting only the distinct ones).

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

The square root of 91016 is about 301.6885811561. The cubic root of 91016 is about 44.9820504544.

The spelling of 91016 in words is "ninety-one thousand, sixteen".