664287149 has 2 divisors, whose sum is σ = 664287150. Its totient is φ = 664287148.

The previous prime is 664287083. The next prime is 664287167. The reversal of 664287149 is 941782466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 551545225 + 112741924 = 23485^2 + 10618^2 .

It is a cyclic number.

It is not a de Polignac number, because 664287149 - 2²⁸ = 395851693 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664287199) 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, 332143574 + 332143575.

It is an arithmetic number, because the mean of its divisors is an integer number (332143575).

Almost surely, 2^664287149 is an apocalyptic number.

It is an amenable number.

664287149 is a deficient number, since it is larger than the sum of its proper divisors (1).

664287149 is an equidigital number, since it uses as much as digits as its factorization.

664287149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The square root of 664287149 is about 25773.7686223804. The cubic root of 664287149 is about 872.5398756279.

The spelling of 664287149 in words is "six hundred sixty-four million, two hundred eighty-seven thousand, one hundred forty-nine".