445223393 has 2 divisors, whose sum is σ = 445223394. Its totient is φ = 445223392.

The previous prime is 445223377. The next prime is 445223477. The reversal of 445223393 is 393322544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309337744 + 135885649 = 17588^2 + 11657^2 .

It is a cyclic number.

It is not a de Polignac number, because 445223393 - 2⁴ = 445223377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (445223593) 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, 222611696 + 222611697.

It is an arithmetic number, because the mean of its divisors is an integer number (222611697).

Almost surely, 2^445223393 is an apocalyptic number.

It is an amenable number.

445223393 is a deficient number, since it is larger than the sum of its proper divisors (1).

445223393 is an equidigital number, since it uses as much as digits as its factorization.

445223393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 35.

The square root of 445223393 is about 21100.3173672815. The cubic root of 445223393 is about 763.5884049122.

The spelling of 445223393 in words is "four hundred forty-five million, two hundred twenty-three thousand, three hundred ninety-three".