641843073 has 6 divisors (see below), whose sum is σ = 927106674. Its totient is φ = 427895376.

The previous prime is 641843039. The next prime is 641843077. The reversal of 641843073 is 370348146.

641843073 is a `hidden beast` number, since 641 + 8 + 4 + 3 + 0 + 7 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 464100849 + 177742224 = 21543^2 + 13332^2 .

It is not a de Polignac number, because 641843073 - 2¹⁰ = 641842049 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (641843077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35657940 + ... + 35657957.

It is an arithmetic number, because the mean of its divisors is an integer number (154517779).

Almost surely, 2^641843073 is an apocalyptic number.

It is an amenable number.

641843073 is a deficient number, since it is larger than the sum of its proper divisors (285263601).

641843073 is a wasteful number, since it uses less digits than its factorization.

641843073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71315903 (or 71315900 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 641843073 is about 25334.6220220472. The cubic root of 641843073 is about 862.6003290977.

The spelling of 641843073 in words is "six hundred forty-one million, eight hundred forty-three thousand, seventy-three".