641059439 has 2 divisors, whose sum is σ = 641059440. Its totient is φ = 641059438.

The previous prime is 641059421. The next prime is 641059453. The reversal of 641059439 is 934950146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641059439 - 2²⁰ = 640010863 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 641059396 and 641059405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641059459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320529719 + 320529720.

It is an arithmetic number, because the mean of its divisors is an integer number (320529720).

Almost surely, 2^641059439 is an apocalyptic number.

641059439 is a deficient number, since it is larger than the sum of its proper divisors (1).

641059439 is an equidigital number, since it uses as much as digits as its factorization.

641059439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 641059439 is about 25319.1516248077. The cubic root of 641059439 is about 862.2491330610.

The spelling of 641059439 in words is "six hundred forty-one million, fifty-nine thousand, four hundred thirty-nine".