8640133 has 2 divisors, whose sum is σ = 8640134. Its totient is φ = 8640132.

The previous prime is 8640109. The next prime is 8640161. The reversal of 8640133 is 3310468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8168164 + 471969 = 2858^2 + 687^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8640133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8640098 and 8640107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8640733) 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, 4320066 + 4320067.

It is an arithmetic number, because the mean of its divisors is an integer number (4320067).

Almost surely, 2^8640133 is an apocalyptic number.

It is an amenable number.

8640133 is a deficient number, since it is larger than the sum of its proper divisors (1).

8640133 is an equidigital number, since it uses as much as digits as its factorization.

8640133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 8640133 is about 2939.4103150122. The cubic root of 8640133 is about 205.1981664977.

The spelling of 8640133 in words is "eight million, six hundred forty thousand, one hundred thirty-three".