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BaseRepresentation
bin100011010110001
3220211021
410122301
51034342
6215441
7103522
oct43261
926737
1018097
1112662
12a581
138311
146849
155567
hex46b1

18097 has 2 divisors, whose sum is σ = 18098. Its totient is φ = 18096.

The previous prime is 18089. The next prime is 18119. The reversal of 18097 is 79081.

18097 is nontrivially palindromic in base 2.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12321 + 5776 = 111^2 + 76^2 .

It is a cyclic number.

It is not a de Polignac number, because 18097 - 23 = 18089 is a prime.

It is a plaindrome in base 15.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (18047) by changing a digit.

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 as a sum of consecutive naturals, namely, 9048 + 9049.

It is an arithmetic number, because the mean of its divisors is an integer number (9049).

218097 is an apocalyptic number.

It is an amenable number.

18097 is a deficient number, since it is larger than the sum of its proper divisors (1).

18097 is an equidigital number, since it uses as much as digits as its factorization.

18097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 18097 is about 134.5250905965. The cubic root of 18097 is about 26.2544059120.

The spelling of 18097 in words is "eighteen thousand, ninety-seven".