64645043 has 2 divisors, whose sum is σ = 64645044. Its totient is φ = 64645042.

The previous prime is 64645037. The next prime is 64645081. The reversal of 64645043 is 34054646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64645043 - 2⁴ = 64645027 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64645093) 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, 32322521 + 32322522.

It is an arithmetic number, because the mean of its divisors is an integer number (32322522).

Almost surely, 2^64645043 is an apocalyptic number.

64645043 is a deficient number, since it is larger than the sum of its proper divisors (1).

64645043 is an equidigital number, since it uses as much as digits as its factorization.

64645043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 64645043 is about 8040.2141140644. The cubic root of 64645043 is about 401.3393499323.

Adding to 64645043 its reverse (34054646), we get a palindrome (98699689).

The spelling of 64645043 in words is "sixty-four million, six hundred forty-five thousand, forty-three".