81068093 has 4 divisors (see below), whose sum is σ = 81086400. Its totient is φ = 81049788.

The previous prime is 81068089. The next prime is 81068129. The reversal of 81068093 is 39086018.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81068093 - 2² = 81068089 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 (81068063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2108 + ... + 12906.

It is an arithmetic number, because the mean of its divisors is an integer number (20271600).

Almost surely, 2^81068093 is an apocalyptic number.

It is an amenable number.

81068093 is a deficient number, since it is larger than the sum of its proper divisors (18307).

81068093 is a wasteful number, since it uses less digits than its factorization.

81068093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18306.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 81068093 is about 9003.7821497413. The cubic root of 81068093 is about 432.7960804668.

The spelling of 81068093 in words is "eighty-one million, sixty-eight thousand, ninety-three".