641024653 has 2 divisors, whose sum is σ = 641024654. Its totient is φ = 641024652.

The previous prime is 641024647. The next prime is 641024663. The reversal of 641024653 is 356420146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 532594084 + 108430569 = 23078^2 + 10413^2 .

It is a cyclic number.

It is not a de Polignac number, because 641024653 - 2²¹ = 638927501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641024623) 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, 320512326 + 320512327.

It is an arithmetic number, because the mean of its divisors is an integer number (320512327).

Almost surely, 2^641024653 is an apocalyptic number.

It is an amenable number.

641024653 is a deficient number, since it is larger than the sum of its proper divisors (1).

641024653 is an equidigital number, since it uses as much as digits as its factorization.

641024653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 641024653 is about 25318.4646651411. The cubic root of 641024653 is about 862.2335366181.

Adding to 641024653 its reverse (356420146), we get a palindrome (997444799).

The spelling of 641024653 in words is "six hundred forty-one million, twenty-four thousand, six hundred fifty-three".