64000817 has 2 divisors, whose sum is σ = 64000818. Its totient is φ = 64000816.

The previous prime is 64000757. The next prime is 64000819. The reversal of 64000817 is 71800046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47872561 + 16128256 = 6919^2 + 4016^2 .

It is a cyclic number.

It is not a de Polignac number, because 64000817 - 2⁶ = 64000753 is a prime.

It is a super-2 number, since 2×64000817² = 8192209153334978, which contains 22 as substring.

Together with 64000819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64000819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32000408 + 32000409.

It is an arithmetic number, because the mean of its divisors is an integer number (32000409).

Almost surely, 2^64000817 is an apocalyptic number.

It is an amenable number.

64000817 is a deficient number, since it is larger than the sum of its proper divisors (1).

64000817 is an equidigital number, since it uses as much as digits as its factorization.

64000817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 64000817 is about 8000.0510623370. The cubic root of 64000817 is about 400.0017020761.

The spelling of 64000817 in words is "sixty-four million, eight hundred seventeen", and thus it is an aban number.