64641043 has 2 divisors, whose sum is σ = 64641044. Its totient is φ = 64641042.

The previous prime is 64641023. The next prime is 64641077. The reversal of 64641043 is 34014646.

It is a happy number.

64641043 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 is a cyclic number.

It is not a de Polignac number, because 64641043 - 2¹⁷ = 64509971 is a prime.

It is not a weakly prime, because it can be changed into another prime (64641013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32320521 + 32320522.

It is an arithmetic number, because the mean of its divisors is an integer number (32320522).

Almost surely, 2^64641043 is an apocalyptic number.

64641043 is a deficient number, since it is larger than the sum of its proper divisors (1).

64641043 is an equidigital number, since it uses as much as digits as its factorization.

64641043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 64641043 is about 8039.9653606219. The cubic root of 64641043 is about 401.3310719554.

Adding to 64641043 its reverse (34014646), we get a palindrome (98655689).

The spelling of 64641043 in words is "sixty-four million, six hundred forty-one thousand, forty-three".