64717517 has 2 divisors, whose sum is σ = 64717518. Its totient is φ = 64717516.

The previous prime is 64717481. The next prime is 64717519. The reversal of 64717517 is 71571746.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37039396 + 27678121 = 6086^2 + 5261^2 .

It is a cyclic number.

It is not a de Polignac number, because 64717517 - 2¹⁶ = 64651981 is a prime.

Together with 64717519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64717519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32358758 + 32358759.

It is an arithmetic number, because the mean of its divisors is an integer number (32358759).

Almost surely, 2^64717517 is an apocalyptic number.

It is an amenable number.

64717517 is a deficient number, since it is larger than the sum of its proper divisors (1).

64717517 is an equidigital number, since it uses as much as digits as its factorization.

64717517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41160, while the sum is 38.

The square root of 64717517 is about 8044.7198211000. The cubic root of 64717517 is about 401.4892753492.

The spelling of 64717517 in words is "sixty-four million, seven hundred seventeen thousand, five hundred seventeen".