81119 has 2 divisors, whose sum is σ = 81120. Its totient is φ = 81118.

The previous prime is 81101. The next prime is 81131. The reversal of 81119 is 91118.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81119 - 2⁸ = 80863 is a prime.

It is a super-2 number, since 2×81119² = 13160584322, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 13 and base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 81119.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40559 + 40560.

It is an arithmetic number, because the mean of its divisors is an integer number (40560).

2⁸¹¹¹⁹ is an apocalyptic number.

81119 is a deficient number, since it is larger than the sum of its proper divisors (1).

81119 is an equidigital number, since it uses as much as digits as its factorization.

81119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 20.

The square root of 81119 is about 284.8139743763. The cubic root of 81119 is about 43.2886653462.

Subtracting 81119 from its reverse (91118), we obtain a palindrome (9999).

The spelling of 81119 in words is "eighty-one thousand, one hundred nineteen".