816001133 has 2 divisors, whose sum is σ = 816001134. Its totient is φ = 816001132.

The previous prime is 816001111. The next prime is 816001171. The reversal of 816001133 is 331100618.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 696273769 + 119727364 = 26387^2 + 10942^2 .

It is a cyclic number.

It is not a de Polignac number, because 816001133 - 2¹² = 815997037 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 816001099 and 816001108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816001103) 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, 408000566 + 408000567.

It is an arithmetic number, because the mean of its divisors is an integer number (408000567).

Almost surely, 2^816001133 is an apocalyptic number.

It is an amenable number.

816001133 is a deficient number, since it is larger than the sum of its proper divisors (1).

816001133 is an equidigital number, since it uses as much as digits as its factorization.

816001133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 816001133 is about 28565.7335456312. The cubic root of 816001133 is about 934.4661781666.

The spelling of 816001133 in words is "eight hundred sixteen million, one thousand, one hundred thirty-three".