641298193 has 2 divisors, whose sum is σ = 641298194. Its totient is φ = 641298192.

The previous prime is 641298181. The next prime is 641298227. The reversal of 641298193 is 391892146.

It is a happy number.

641298193 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., 626150529 + 15147664 = 25023^2 + 3892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641298193 is a prime.

It is a super-2 number, since 2×641298193² = 822526744690130498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641298113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320649096 + 320649097.

It is an arithmetic number, because the mean of its divisors is an integer number (320649097).

Almost surely, 2^641298193 is an apocalyptic number.

It is an amenable number.

641298193 is a deficient number, since it is larger than the sum of its proper divisors (1).

641298193 is an equidigital number, since it uses as much as digits as its factorization.

641298193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The square root of 641298193 is about 25323.8660753053. The cubic root of 641298193 is about 862.3561641541.

The spelling of 641298193 in words is "six hundred forty-one million, two hundred ninety-eight thousand, one hundred ninety-three".