64145717 has 2 divisors, whose sum is σ = 64145718. Its totient is φ = 64145716.

The previous prime is 64145699. The next prime is 64145747. The reversal of 64145717 is 71754146.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47872561 + 16273156 = 6919^2 + 4034^2 .

It is a cyclic number.

It is not a de Polignac number, because 64145717 - 2¹² = 64141621 is a prime.

It is a super-2 number, since 2×64145717² = 8229346018888178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64145747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32072858 + 32072859.

It is an arithmetic number, because the mean of its divisors is an integer number (32072859).

Almost surely, 2^64145717 is an apocalyptic number.

It is an amenable number.

64145717 is a deficient number, since it is larger than the sum of its proper divisors (1).

64145717 is an equidigital number, since it uses as much as digits as its factorization.

64145717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 35.

The square root of 64145717 is about 8009.1021344468. The cubic root of 64145717 is about 400.3033469767.

The spelling of 64145717 in words is "sixty-four million, one hundred forty-five thousand, seven hundred seventeen".