445343009 has 2 divisors, whose sum is σ = 445343010. Its totient is φ = 445343008.

The previous prime is 445342991. The next prime is 445343011. The reversal of 445343009 is 900343544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 445336609 + 6400 = 21103^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 445343009 - 2¹⁶ = 445277473 is a prime.

Together with 445343011, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_23619173 and since 445343009 and 23619173 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (445343039) 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, 222671504 + 222671505.

It is an arithmetic number, because the mean of its divisors is an integer number (222671505).

Almost surely, 2^445343009 is an apocalyptic number.

It is an amenable number.

445343009 is a deficient number, since it is larger than the sum of its proper divisors (1).

445343009 is an equidigital number, since it uses as much as digits as its factorization.

445343009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 445343009 is about 21103.1516366632. The cubic root of 445343009 is about 763.6567819813.

The spelling of 445343009 in words is "four hundred forty-five million, three hundred forty-three thousand, nine".