445544389 has 2 divisors, whose sum is σ = 445544390. Its totient is φ = 445544388.

The previous prime is 445544387. The next prime is 445544401. The reversal of 445544389 is 983445544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 374732164 + 70812225 = 19358^2 + 8415^2 .

It is a cyclic number.

It is not a de Polignac number, because 445544389 - 2¹ = 445544387 is a prime.

Together with 445544387, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445544387) 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, 222772194 + 222772195.

It is an arithmetic number, because the mean of its divisors is an integer number (222772195).

Almost surely, 2^445544389 is an apocalyptic number.

It is an amenable number.

445544389 is a deficient number, since it is larger than the sum of its proper divisors (1).

445544389 is an equidigital number, since it uses as much as digits as its factorization.

445544389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382400, while the sum is 46.

The square root of 445544389 is about 21107.9224226355. The cubic root of 445544389 is about 763.7718708195.

The spelling of 445544389 in words is "four hundred forty-five million, five hundred forty-four thousand, three hundred eighty-nine".