81353 has 2 divisors, whose sum is σ = 81354. Its totient is φ = 81352.

The previous prime is 81349. The next prime is 81359. The reversal of 81353 is 35318.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76729 + 4624 = 277^2 + 68^2 .

It is a cyclic number.

It is not a de Polignac number, because 81353 - 2² = 81349 is a prime.

It is not a weakly prime, because it can be changed into another prime (81359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40676 + 40677.

It is an arithmetic number, because the mean of its divisors is an integer number (40677).

2⁸¹³⁵³ is an apocalyptic number.

It is an amenable number.

81353 is a deficient number, since it is larger than the sum of its proper divisors (1).

81353 is an equidigital number, since it uses as much as digits as its factorization.

81353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 20.

The square root of 81353 is about 285.2244730033. The cubic root of 81353 is about 43.3302496162.

It can be divided in two parts, 81 and 353, that added together give a palindrome (434).

The spelling of 81353 in words is "eighty-one thousand, three hundred fifty-three".