659796217 has 2 divisors, whose sum is σ = 659796218. Its totient is φ = 659796216.

The previous prime is 659796211. The next prime is 659796259. The reversal of 659796217 is 712697956.

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., 649434256 + 10361961 = 25484^2 + 3219^2 .

It is a cyclic number.

It is not a de Polignac number, because 659796217 - 2³ = 659796209 is a prime.

It is a super-2 number, since 2×659796217² = 870662095935022178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (659796211) 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, 329898108 + 329898109.

It is an arithmetic number, because the mean of its divisors is an integer number (329898109).

Almost surely, 2^659796217 is an apocalyptic number.

It is an amenable number.

659796217 is a deficient number, since it is larger than the sum of its proper divisors (1).

659796217 is an equidigital number, since it uses as much as digits as its factorization.

659796217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 52.

The square root of 659796217 is about 25686.4987298775. The cubic root of 659796217 is about 870.5691510770.

The spelling of 659796217 in words is "six hundred fifty-nine million, seven hundred ninety-six thousand, two hundred seventeen".