641834653 has 2 divisors, whose sum is σ = 641834654. Its totient is φ = 641834652.

The previous prime is 641834651. The next prime is 641834663. The reversal of 641834653 is 356438146.

641834653 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., 609991204 + 31843449 = 24698^2 + 5643^2 .

It is a cyclic number.

It is not a de Polignac number, because 641834653 - 2¹ = 641834651 is a prime.

Together with 641834651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641834651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320917326 + 320917327.

It is an arithmetic number, because the mean of its divisors is an integer number (320917327).

Almost surely, 2^641834653 is an apocalyptic number.

It is an amenable number.

641834653 is a deficient number, since it is larger than the sum of its proper divisors (1).

641834653 is an equidigital number, since it uses as much as digits as its factorization.

641834653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 40.

The square root of 641834653 is about 25334.4558457449. The cubic root of 641834653 is about 862.5965570819.

The spelling of 641834653 in words is "six hundred forty-one million, eight hundred thirty-four thousand, six hundred fifty-three".