641606033 has 2 divisors, whose sum is σ = 641606034. Its totient is φ = 641606032.

The previous prime is 641605981. The next prime is 641606047. The reversal of 641606033 is 330606146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640241809 + 1364224 = 25303^2 + 1168^2 .

It is a cyclic number.

It is not a de Polignac number, because 641606033 - 2¹⁰ = 641605009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 641605987 and 641606005.

It is not a weakly prime, because it can be changed into another prime (641606083) 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, 320803016 + 320803017.

It is an arithmetic number, because the mean of its divisors is an integer number (320803017).

Almost surely, 2^641606033 is an apocalyptic number.

It is an amenable number.

641606033 is a deficient number, since it is larger than the sum of its proper divisors (1).

641606033 is an equidigital number, since it uses as much as digits as its factorization.

641606033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 641606033 is about 25329.9434069640. The cubic root of 641606033 is about 862.4941266281.

The spelling of 641606033 in words is "six hundred forty-one million, six hundred six thousand, thirty-three".