81192043 has 2 divisors, whose sum is σ = 81192044. Its totient is φ = 81192042.

The previous prime is 81191993. The next prime is 81192071. The reversal of 81192043 is 34029118.

It is a happy number.

It is an a-pointer prime, because the next prime (81192071) can be obtained adding 81192043 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81192043 - 2⁹ = 81191531 is a prime.

It is not a weakly prime, because it can be changed into another prime (81192443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40596021 + 40596022.

It is an arithmetic number, because the mean of its divisors is an integer number (40596022).

Almost surely, 2^81192043 is an apocalyptic number.

81192043 is a deficient number, since it is larger than the sum of its proper divisors (1).

81192043 is an equidigital number, since it uses as much as digits as its factorization.

81192043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 81192043 is about 9010.6627392218. The cubic root of 81192043 is about 433.0165443385.

The spelling of 81192043 in words is "eighty-one million, one hundred ninety-two thousand, forty-three".