445040243 has 2 divisors, whose sum is σ = 445040244. Its totient is φ = 445040242.

The previous prime is 445040231. The next prime is 445040257. The reversal of 445040243 is 342040544.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 445040243 - 2¹² = 445036147 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (445040543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222520121 + 222520122.

It is an arithmetic number, because the mean of its divisors is an integer number (222520122).

Almost surely, 2^445040243 is an apocalyptic number.

445040243 is a deficient number, since it is larger than the sum of its proper divisors (1).

445040243 is an equidigital number, since it uses as much as digits as its factorization.

445040243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 445040243 is about 21095.9769387436. The cubic root of 445040243 is about 763.4836856486.

Adding to 445040243 its reverse (342040544), we get a palindrome (787080787).

The spelling of 445040243 in words is "four hundred forty-five million, forty thousand, two hundred forty-three".