64740943 has 2 divisors, whose sum is σ = 64740944. Its totient is φ = 64740942.

The previous prime is 64740937. The next prime is 64740953. The reversal of 64740943 is 34904746.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64740943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64740953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32370471 + 32370472.

It is an arithmetic number, because the mean of its divisors is an integer number (32370472).

Almost surely, 2^64740943 is an apocalyptic number.

64740943 is a deficient number, since it is larger than the sum of its proper divisors (1).

64740943 is an equidigital number, since it uses as much as digits as its factorization.

64740943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 64740943 is about 8046.1756754374. The cubic root of 64740943 is about 401.5377122774.

The spelling of 64740943 in words is "sixty-four million, seven hundred forty thousand, nine hundred forty-three".