444645137 has 2 divisors, whose sum is σ = 444645138. Its totient is φ = 444645136.

The previous prime is 444645133. The next prime is 444645151. The reversal of 444645137 is 731546444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439698961 + 4946176 = 20969^2 + 2224^2 .

It is a cyclic number.

It is not a de Polignac number, because 444645137 - 2² = 444645133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 444645137.

It is not a weakly prime, because it can be changed into another prime (444645133) 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, 222322568 + 222322569.

It is an arithmetic number, because the mean of its divisors is an integer number (222322569).

Almost surely, 2^444645137 is an apocalyptic number.

It is an amenable number.

444645137 is a deficient number, since it is larger than the sum of its proper divisors (1).

444645137 is an equidigital number, since it uses as much as digits as its factorization.

444645137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 38.

The square root of 444645137 is about 21086.6103724615. The cubic root of 444645137 is about 763.2576788967.

The spelling of 444645137 in words is "four hundred forty-four million, six hundred forty-five thousand, one hundred thirty-seven".