81335363 has 2 divisors, whose sum is σ = 81335364. Its totient is φ = 81335362.

The previous prime is 81335347. The next prime is 81335381. The reversal of 81335363 is 36353318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81335363 - 2⁴ = 81335347 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (81335063) 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 as a sum of consecutive naturals, namely, 40667681 + 40667682.

It is an arithmetic number, because the mean of its divisors is an integer number (40667682).

Almost surely, 2^81335363 is an apocalyptic number.

81335363 is a deficient number, since it is larger than the sum of its proper divisors (1).

81335363 is an equidigital number, since it uses as much as digits as its factorization.

81335363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 32.

The square root of 81335363 is about 9018.6120329017. The cubic root of 81335363 is about 433.2711811584.

The spelling of 81335363 in words is "eighty-one million, three hundred thirty-five thousand, three hundred sixty-three".