81096923 has 2 divisors, whose sum is σ = 81096924. Its totient is φ = 81096922.

The previous prime is 81096913. The next prime is 81096971. The reversal of 81096923 is 32969018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81096923 - 2⁴ = 81096907 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (81096913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40548461 + 40548462.

It is an arithmetic number, because the mean of its divisors is an integer number (40548462).

Almost surely, 2^81096923 is an apocalyptic number.

81096923 is a deficient number, since it is larger than the sum of its proper divisors (1).

81096923 is an equidigital number, since it uses as much as digits as its factorization.

81096923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 81096923 is about 9005.3830012943. The cubic root of 81096923 is about 432.8473790387.

The spelling of 81096923 in words is "eighty-one million, ninety-six thousand, nine hundred twenty-three".