81795803 has 2 divisors, whose sum is σ = 81795804. Its totient is φ = 81795802.

The previous prime is 81795793. The next prime is 81795809. The reversal of 81795803 is 30859718.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81795803 - 2¹⁴ = 81779419 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (81795809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40897901 + 40897902.

It is an arithmetic number, because the mean of its divisors is an integer number (40897902).

Almost surely, 2^81795803 is an apocalyptic number.

81795803 is a deficient number, since it is larger than the sum of its proper divisors (1).

81795803 is an equidigital number, since it uses as much as digits as its factorization.

81795803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 81795803 is about 9044.1032170138. The cubic root of 81795803 is about 434.0872268347.

The spelling of 81795803 in words is "eighty-one million, seven hundred ninety-five thousand, eight hundred three".