81362103 has 4 divisors (see below), whose sum is σ = 108482808. Its totient is φ = 54241400.

The previous prime is 81362101. The next prime is 81362111. The reversal of 81362103 is 30126318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81362103 - 2¹ = 81362101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81362101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13560348 + ... + 13560353.

It is an arithmetic number, because the mean of its divisors is an integer number (27120702).

Almost surely, 2^81362103 is an apocalyptic number.

81362103 is a deficient number, since it is larger than the sum of its proper divisors (27120705).

81362103 is a wasteful number, since it uses less digits than its factorization.

81362103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27120704.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 81362103 is about 9020.0944008364. The cubic root of 81362103 is about 433.3186570309.

The spelling of 81362103 in words is "eighty-one million, three hundred sixty-two thousand, one hundred three".