91497 has 8 divisors (see below), whose sum is σ = 139456. Its totient is φ = 52272.

The previous prime is 91493. The next prime is 91499. The reversal of 91497 is 79419.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91497 - 2² = 91493 is a prime.

It is a super-5 number, since 5×91497⁵ (a number of 26 digits) contains 55555 as substring.

It is a Duffinian number.

91497 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (91493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2158 + ... + 2199.

It is an arithmetic number, because the mean of its divisors is an integer number (17432).

2⁹¹⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

91497 is a deficient number, since it is larger than the sum of its proper divisors (47959).

91497 is a wasteful number, since it uses less digits than its factorization.

91497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4367.

The product of its digits is 2268, while the sum is 30.

The square root of 91497 is about 302.4847103574. The cubic root of 91497 is about 45.0611514303.

The spelling of 91497 in words is "ninety-one thousand, four hundred ninety-seven".