81094093 has 2 divisors, whose sum is σ = 81094094. Its totient is φ = 81094092.

The previous prime is 81094073. The next prime is 81094099. The reversal of 81094093 is 39049018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45118089 + 35976004 = 6717^2 + 5998^2 .

It is a cyclic number.

It is not a de Polignac number, because 81094093 - 2⁵ = 81094061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81094099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40547046 + 40547047.

It is an arithmetic number, because the mean of its divisors is an integer number (40547047).

Almost surely, 2^81094093 is an apocalyptic number.

It is an amenable number.

81094093 is a deficient number, since it is larger than the sum of its proper divisors (1).

81094093 is an equidigital number, since it uses as much as digits as its factorization.

81094093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 81094093 is about 9005.2258716814. The cubic root of 81094093 is about 432.8423440251.

The spelling of 81094093 in words is "eighty-one million, ninety-four thousand, ninety-three".