81733303 has 2 divisors, whose sum is σ = 81733304. Its totient is φ = 81733302.

The previous prime is 81733279. The next prime is 81733343. The reversal of 81733303 is 30333718.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81733303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81733343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40866651 + 40866652.

It is an arithmetic number, because the mean of its divisors is an integer number (40866652).

Almost surely, 2^81733303 is an apocalyptic number.

81733303 is a deficient number, since it is larger than the sum of its proper divisors (1).

81733303 is an equidigital number, since it uses as much as digits as its factorization.

81733303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 81733303 is about 9040.6472666508. The cubic root of 81733303 is about 433.9766369523.

It can be divided in two parts, 8173 and 3303, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 81733303 in words is "eighty-one million, seven hundred thirty-three thousand, three hundred three".