64517743 has 2 divisors, whose sum is σ = 64517744. Its totient is φ = 64517742.

The previous prime is 64517731. The next prime is 64517753. The reversal of 64517743 is 34771546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64517743 - 2¹⁷ = 64386671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64517753) 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, 32258871 + 32258872.

It is an arithmetic number, because the mean of its divisors is an integer number (32258872).

Almost surely, 2^64517743 is an apocalyptic number.

64517743 is a deficient number, since it is larger than the sum of its proper divisors (1).

64517743 is an equidigital number, since it uses as much as digits as its factorization.

64517743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 37.

The square root of 64517743 is about 8032.2937570784. The cubic root of 64517743 is about 401.0757356387.

The spelling of 64517743 in words is "sixty-four million, five hundred seventeen thousand, seven hundred forty-three".