664234229 has 2 divisors, whose sum is σ = 664234230. Its totient is φ = 664234228.

The previous prime is 664234199. The next prime is 664234231. The reversal of 664234229 is 922432466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 465480625 + 198753604 = 21575^2 + 14098^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664234229 is a prime.

It is a super-2 number, since 2×664234229² = 882414221950448882, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 664234231, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 664234192 and 664234201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664234289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332117114 + 332117115.

It is an arithmetic number, because the mean of its divisors is an integer number (332117115).

Almost surely, 2^664234229 is an apocalyptic number.

It is an amenable number.

664234229 is a deficient number, since it is larger than the sum of its proper divisors (1).

664234229 is an equidigital number, since it uses as much as digits as its factorization.

664234229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 38.

The square root of 664234229 is about 25772.7419767474. The cubic root of 664234229 is about 872.5167049070.

The spelling of 664234229 in words is "six hundred sixty-four million, two hundred thirty-four thousand, two hundred twenty-nine".