91197 has 6 divisors (see below), whose sum is σ = 131742. Its totient is φ = 60792.

The previous prime is 91193. The next prime is 91199. The reversal of 91197 is 79119.

It can be written as a sum of positive squares in only one way, i.e., 86436 + 4761 = 294^2 + 69^2 .

It is not a de Polignac number, because 91197 - 2² = 91193 is a prime.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 91197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91193) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5058 + ... + 5075.

It is an arithmetic number, because the mean of its divisors is an integer number (21957).

2⁹¹¹⁹⁷ is an apocalyptic number.

It is an amenable number.

91197 is a deficient number, since it is larger than the sum of its proper divisors (40545).

91197 is a wasteful number, since it uses less digits than its factorization.

91197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10139 (or 10136 counting only the distinct ones).

The product of its digits is 567, while the sum is 27.

The square root of 91197 is about 301.9884103736. The cubic root of 91197 is about 45.0118487317.

The spelling of 91197 in words is "ninety-one thousand, one hundred ninety-seven".