445143313 has 2 divisors, whose sum is σ = 445143314. Its totient is φ = 445143312.

The previous prime is 445143289. The next prime is 445143329. The reversal of 445143313 is 313341544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 444703744 + 439569 = 21088^2 + 663^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445143313 is a prime.

It is not a weakly prime, because it can be changed into another prime (445140313) 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, 222571656 + 222571657.

It is an arithmetic number, because the mean of its divisors is an integer number (222571657).

Almost surely, 2^445143313 is an apocalyptic number.

It is an amenable number.

445143313 is a deficient number, since it is larger than the sum of its proper divisors (1).

445143313 is an equidigital number, since it uses as much as digits as its factorization.

445143313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 28.

The square root of 445143313 is about 21098.4196801561. The cubic root of 445143313 is about 763.5426212846.

Adding to 445143313 its reverse (313341544), we get a palindrome (758484857).

The spelling of 445143313 in words is "four hundred forty-five million, one hundred forty-three thousand, three hundred thirteen".