643134341 has 2 divisors, whose sum is σ = 643134342. Its totient is φ = 643134340.

The previous prime is 643134337. The next prime is 643134377. The reversal of 643134341 is 143431346.

643134341 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 495997441 + 147136900 = 22271^2 + 12130^2 .

It is a cyclic number.

It is not a de Polignac number, because 643134341 - 2² = 643134337 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (643134301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321567170 + 321567171.

It is an arithmetic number, because the mean of its divisors is an integer number (321567171).

Almost surely, 2^643134341 is an apocalyptic number.

It is an amenable number.

643134341 is a deficient number, since it is larger than the sum of its proper divisors (1).

643134341 is an equidigital number, since it uses as much as digits as its factorization.

643134341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 29.

The square root of 643134341 is about 25360.0934738025. The cubic root of 643134341 is about 863.1784050225.

Adding to 643134341 its reverse (143431346), we get a palindrome (786565687).

The spelling of 643134341 in words is "six hundred forty-three million, one hundred thirty-four thousand, three hundred forty-one".