641384533 has 2 divisors, whose sum is σ = 641384534. Its totient is φ = 641384532.

The previous prime is 641384519. The next prime is 641384587. The reversal of 641384533 is 335483146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 533702404 + 107682129 = 23102^2 + 10377^2 .

It is a cyclic number.

It is not a de Polignac number, because 641384533 - 2⁹ = 641384021 is a prime.

It is a super-2 number, since 2×641384533² = 822748238343256178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641384492 and 641384501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641384333) 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, 320692266 + 320692267.

It is an arithmetic number, because the mean of its divisors is an integer number (320692267).

Almost surely, 2^641384533 is an apocalyptic number.

It is an amenable number.

641384533 is a deficient number, since it is larger than the sum of its proper divisors (1).

641384533 is an equidigital number, since it uses as much as digits as its factorization.

641384533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 37.

The square root of 641384533 is about 25325.5707339440. The cubic root of 641384533 is about 862.3948629949.

The spelling of 641384533 in words is "six hundred forty-one million, three hundred eighty-four thousand, five hundred thirty-three".