81203 has 2 divisors, whose sum is σ = 81204. Its totient is φ = 81202.

The previous prime is 81199. The next prime is 81223. The reversal of 81203 is 30218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81203 - 2² = 81199 is a prime.

It is a plaindrome in base 9.

It is not a weakly prime, because it can be changed into another prime (81223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40601 + 40602.

It is an arithmetic number, because the mean of its divisors is an integer number (40602).

2⁸¹²⁰³ is an apocalyptic number.

81203 is a deficient number, since it is larger than the sum of its proper divisors (1).

81203 is an equidigital number, since it uses as much as digits as its factorization.

81203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 81203 is about 284.9614008949. The cubic root of 81203 is about 43.3036022228.

The spelling of 81203 in words is "eighty-one thousand, two hundred three".