444664513 has 2 divisors, whose sum is σ = 444664514. Its totient is φ = 444664512.

The previous prime is 444664481. The next prime is 444664531. The reversal of 444664513 is 315466444.

Together with next prime (444664531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 389786049 + 54878464 = 19743^2 + 7408^2 .

It is a cyclic number.

It is not a de Polignac number, because 444664513 - 2⁵ = 444664481 is a prime.

It is not a weakly prime, because it can be changed into another prime (444664013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222332256 + 222332257.

It is an arithmetic number, because the mean of its divisors is an integer number (222332257).

Almost surely, 2^444664513 is an apocalyptic number.

It is an amenable number.

444664513 is a deficient number, since it is larger than the sum of its proper divisors (1).

444664513 is an equidigital number, since it uses as much as digits as its factorization.

444664513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 37.

The square root of 444664513 is about 21087.0698059261. The cubic root of 444664513 is about 763.2687653900.

The spelling of 444664513 in words is "four hundred forty-four million, six hundred sixty-four thousand, five hundred thirteen".