664144097 has 2 divisors, whose sum is σ = 664144098. Its totient is φ = 664144096.

The previous prime is 664144057. The next prime is 664144099. The reversal of 664144097 is 790441466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 579798241 + 84345856 = 24079^2 + 9184^2 .

It is a cyclic number.

It is not a de Polignac number, because 664144097 - 2¹⁴ = 664127713 is a prime.

Together with 664144099, 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 (664144099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332072048 + 332072049.

It is an arithmetic number, because the mean of its divisors is an integer number (332072049).

Almost surely, 2^664144097 is an apocalyptic number.

It is an amenable number.

664144097 is a deficient number, since it is larger than the sum of its proper divisors (1).

664144097 is an equidigital number, since it uses as much as digits as its factorization.

664144097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 664144097 is about 25770.9933258305. The cubic root of 664144097 is about 872.4772382904.

The spelling of 664144097 in words is "six hundred sixty-four million, one hundred forty-four thousand, ninety-seven".