64641001 has 2 divisors, whose sum is σ = 64641002. Its totient is φ = 64641000.

The previous prime is 64640993. The next prime is 64641013. The reversal of 64641001 is 10014646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38875225 + 25765776 = 6235^2 + 5076^2 .

It is a cyclic number.

It is not a de Polignac number, because 64641001 - 2³ = 64640993 is a prime.

It is not a weakly prime, because it can be changed into another prime (64641301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32320500 + 32320501.

It is an arithmetic number, because the mean of its divisors is an integer number (32320501).

Almost surely, 2^64641001 is an apocalyptic number.

It is an amenable number.

64641001 is a deficient number, since it is larger than the sum of its proper divisors (1).

64641001 is an equidigital number, since it uses as much as digits as its factorization.

64641001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 64641001 is about 8039.9627486699. The cubic root of 64641001 is about 401.3309850349.

Adding to 64641001 its reverse (10014646), we get a palindrome (74655647).

The spelling of 64641001 in words is "sixty-four million, six hundred forty-one thousand, one".