81340103 has 8 divisors (see below), whose sum is σ = 87678528. Its totient is φ = 75013344.

The previous prime is 81340081. The next prime is 81340117. The reversal of 81340103 is 30104318.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81340103 - 2⁸ = 81339847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81340123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16301 + ... + 20697.

It is an arithmetic number, because the mean of its divisors is an integer number (10959816).

Almost surely, 2^81340103 is an apocalyptic number.

81340103 is a deficient number, since it is larger than the sum of its proper divisors (6338425).

81340103 is a wasteful number, since it uses less digits than its factorization.

81340103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5833.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 81340103 is about 9018.8748189561. The cubic root of 81340103 is about 433.2795976103.

The spelling of 81340103 in words is "eighty-one million, three hundred forty thousand, one hundred three".