64345517 has 2 divisors, whose sum is σ = 64345518. Its totient is φ = 64345516.

The previous prime is 64345499. The next prime is 64345531. The reversal of 64345517 is 71554346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40589641 + 23755876 = 6371^2 + 4874^2 .

It is a cyclic number.

It is not a de Polignac number, because 64345517 - 2⁸ = 64345261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64345537) 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, 32172758 + 32172759.

It is an arithmetic number, because the mean of its divisors is an integer number (32172759).

Almost surely, 2^64345517 is an apocalyptic number.

It is an amenable number.

64345517 is a deficient number, since it is larger than the sum of its proper divisors (1).

64345517 is an equidigital number, since it uses as much as digits as its factorization.

64345517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 35.

The square root of 64345517 is about 8021.5657449154. The cubic root of 64345517 is about 400.7185355770.

The spelling of 64345517 in words is "sixty-four million, three hundred forty-five thousand, five hundred seventeen".