428340317 has 2 divisors, whose sum is σ = 428340318. Its totient is φ = 428340316.

The previous prime is 428340307. The next prime is 428340331. The reversal of 428340317 is 713043824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 414285316 + 14055001 = 20354^2 + 3749^2 .

It is a cyclic number.

It is not a de Polignac number, because 428340317 - 2⁸ = 428340061 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428340307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214170158 + 214170159.

It is an arithmetic number, because the mean of its divisors is an integer number (214170159).

Almost surely, 2^428340317 is an apocalyptic number.

It is an amenable number.

428340317 is a deficient number, since it is larger than the sum of its proper divisors (1).

428340317 is an equidigital number, since it uses as much as digits as its factorization.

428340317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 428340317 is about 20696.3841527935. The cubic root of 428340317 is about 753.8118921114.

The spelling of 428340317 in words is "four hundred twenty-eight million, three hundred forty thousand, three hundred seventeen".