641020273 has 2 divisors, whose sum is σ = 641020274. Its totient is φ = 641020272.

The previous prime is 641020249. The next prime is 641020277. The reversal of 641020273 is 372020146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 627602704 + 13417569 = 25052^2 + 3663^2 .

It is a cyclic number.

It is not a de Polignac number, because 641020273 - 2⁹ = 641019761 is a prime.

It is not a weakly prime, because it can be changed into another prime (641020277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320510136 + 320510137.

It is an arithmetic number, because the mean of its divisors is an integer number (320510137).

Almost surely, 2^641020273 is an apocalyptic number.

It is an amenable number.

641020273 is a deficient number, since it is larger than the sum of its proper divisors (1).

641020273 is an equidigital number, since it uses as much as digits as its factorization.

641020273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 641020273 is about 25318.3781668574. The cubic root of 641020273 is about 862.2315727875.

The spelling of 641020273 in words is "six hundred forty-one million, twenty thousand, two hundred seventy-three".