81134033 has 2 divisors, whose sum is σ = 81134034. Its totient is φ = 81134032.

The previous prime is 81134023. The next prime is 81134051. The reversal of 81134033 is 33043118.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63552784 + 17581249 = 7972^2 + 4193^2 .

It is a cyclic number.

It is not a de Polignac number, because 81134033 - 2¹⁴ = 81117649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (81134023) 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, 40567016 + 40567017.

It is an arithmetic number, because the mean of its divisors is an integer number (40567017).

Almost surely, 2^81134033 is an apocalyptic number.

It is an amenable number.

81134033 is a deficient number, since it is larger than the sum of its proper divisors (1).

81134033 is an equidigital number, since it uses as much as digits as its factorization.

81134033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 81134033 is about 9007.4431999319. The cubic root of 81134033 is about 432.9133927094.

The spelling of 81134033 in words is "eighty-one million, one hundred thirty-four thousand, thirty-three".