864449149 has 2 divisors, whose sum is σ = 864449150. Its totient is φ = 864449148.

The previous prime is 864449143. The next prime is 864449153. The reversal of 864449149 is 941944468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 663320025 + 201129124 = 25755^2 + 14182^2 .

It is a cyclic number.

It is not a de Polignac number, because 864449149 - 2³ = 864449141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864449141) 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, 432224574 + 432224575.

It is an arithmetic number, because the mean of its divisors is an integer number (432224575).

Almost surely, 2^864449149 is an apocalyptic number.

It is an amenable number.

864449149 is a deficient number, since it is larger than the sum of its proper divisors (1).

864449149 is an equidigital number, since it uses as much as digits as its factorization.

864449149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 49.

The square root of 864449149 is about 29401.5161003646. The cubic root of 864449149 is about 952.6056441632.

The spelling of 864449149 in words is "eight hundred sixty-four million, four hundred forty-nine thousand, one hundred forty-nine".