445019 has 2 divisors, whose sum is σ = 445020. Its totient is φ = 445018.

The previous prime is 445001. The next prime is 445021. The reversal of 445019 is 910544.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445019 is a prime.

It is a super-2 number, since 2×445019² = 396083820722, which contains 22 as substring.

Together with 445021, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 444985 and 445003.

It is not a weakly prime, because it can be changed into another prime (445069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222509 + 222510.

It is an arithmetic number, because the mean of its divisors is an integer number (222510).

2⁴⁴⁵⁰¹⁹ is an apocalyptic number.

445019 is a deficient number, since it is larger than the sum of its proper divisors (1).

445019 is an equidigital number, since it uses as much as digits as its factorization.

445019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 445019 is about 667.0974441564. The cubic root of 445019 is about 76.3471537727.

The spelling of 445019 in words is "four hundred forty-five thousand, nineteen".