445340317 has 2 divisors, whose sum is σ = 445340318. Its totient is φ = 445340316.

The previous prime is 445340299. The next prime is 445340323. The reversal of 445340317 is 713043544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 363817476 + 81522841 = 19074^2 + 9029^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445340317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445340377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222670158 + 222670159.

It is an arithmetic number, because the mean of its divisors is an integer number (222670159).

Almost surely, 2^445340317 is an apocalyptic number.

It is an amenable number.

445340317 is a deficient number, since it is larger than the sum of its proper divisors (1).

445340317 is an equidigital number, since it uses as much as digits as its factorization.

445340317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 445340317 is about 21103.0878546245. The cubic root of 445340317 is about 763.6552432661.

The spelling of 445340317 in words is "four hundred forty-five million, three hundred forty thousand, three hundred seventeen".