646003201 has 2 divisors, whose sum is σ = 646003202. Its totient is φ = 646003200.

The previous prime is 646003157. The next prime is 646003271. The reversal of 646003201 is 102300646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 615089601 + 30913600 = 24801^2 + 5560^2 .

It is a cyclic number.

It is not a de Polignac number, because 646003201 - 2⁷ = 646003073 is a prime.

It is not a weakly prime, because it can be changed into another prime (646003271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323001600 + 323001601.

It is an arithmetic number, because the mean of its divisors is an integer number (323001601).

Almost surely, 2^646003201 is an apocalyptic number.

It is an amenable number.

646003201 is a deficient number, since it is larger than the sum of its proper divisors (1).

646003201 is an equidigital number, since it uses as much as digits as its factorization.

646003201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 646003201 is about 25416.5930250299. The cubic root of 646003201 is about 864.4599750010.

Adding to 646003201 its reverse (102300646), we get a palindrome (748303847).

The spelling of 646003201 in words is "six hundred forty-six million, three thousand, two hundred one".