445925509 has 2 divisors, whose sum is σ = 445925510. Its totient is φ = 445925508.

The previous prime is 445925507. The next prime is 445925527. The reversal of 445925509 is 905529544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 429401284 + 16524225 = 20722^2 + 4065^2 .

It is a cyclic number.

It is not a de Polignac number, because 445925509 - 2¹ = 445925507 is a prime.

Together with 445925507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445925503) 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, 222962754 + 222962755.

It is an arithmetic number, because the mean of its divisors is an integer number (222962755).

Almost surely, 2^445925509 is an apocalyptic number.

It is an amenable number.

445925509 is a deficient number, since it is larger than the sum of its proper divisors (1).

445925509 is an equidigital number, since it uses as much as digits as its factorization.

445925509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324000, while the sum is 43.

The square root of 445925509 is about 21116.9483827564. The cubic root of 445925509 is about 763.9895863323.

The spelling of 445925509 in words is "four hundred forty-five million, nine hundred twenty-five thousand, five hundred nine".