81168103 has 2 divisors, whose sum is σ = 81168104. Its totient is φ = 81168102.

The previous prime is 81168083. The next prime is 81168119. The reversal of 81168103 is 30186118.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81168103 - 2⁹ = 81167591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81168193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40584051 + 40584052.

It is an arithmetic number, because the mean of its divisors is an integer number (40584052).

Almost surely, 2^81168103 is an apocalyptic number.

81168103 is a deficient number, since it is larger than the sum of its proper divisors (1).

81168103 is an equidigital number, since it uses as much as digits as its factorization.

81168103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 81168103 is about 9009.3342151349. The cubic root of 81168103 is about 432.9739809102.

The spelling of 81168103 in words is "eighty-one million, one hundred sixty-eight thousand, one hundred three".