445144489 has 2 divisors, whose sum is σ = 445144490. Its totient is φ = 445144488.

The previous prime is 445144487. The next prime is 445144529. The reversal of 445144489 is 984441544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 424030464 + 21114025 = 20592^2 + 4595^2 .

It is a cyclic number.

It is not a de Polignac number, because 445144489 - 2¹ = 445144487 is a prime.

It is a super-2 number, since 2×445144489² = 396307232174142242, which contains 22 as substring.

Together with 445144487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (445144487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222572244 + 222572245.

It is an arithmetic number, because the mean of its divisors is an integer number (222572245).

Almost surely, 2^445144489 is an apocalyptic number.

It is an amenable number.

445144489 is a deficient number, since it is larger than the sum of its proper divisors (1).

445144489 is an equidigital number, since it uses as much as digits as its factorization.

445144489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 368640, while the sum is 43.

The square root of 445144489 is about 21098.4475495236. The cubic root of 445144489 is about 763.5432936713.

The spelling of 445144489 in words is "four hundred forty-five million, one hundred forty-four thousand, four hundred eighty-nine".