81097 has 2 divisors, whose sum is σ = 81098. Its totient is φ = 81096.

The previous prime is 81083. The next prime is 81101. The reversal of 81097 is 79018.

81097 is nontrivially palindromic in base 6.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80656 + 441 = 284^2 + 21^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81097 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (81017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40548 + 40549.

It is an arithmetic number, because the mean of its divisors is an integer number (40549).

2⁸¹⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

81097 is a deficient number, since it is larger than the sum of its proper divisors (1).

81097 is an equidigital number, since it uses as much as digits as its factorization.

81097 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 81097 is about 284.7753500568. The cubic root of 81097 is about 43.2847516032.

The spelling of 81097 in words is "eighty-one thousand, ninety-seven".