428020297 has 2 divisors, whose sum is σ = 428020298. Its totient is φ = 428020296.

The previous prime is 428020289. The next prime is 428020303. The reversal of 428020297 is 792020824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 333464121 + 94556176 = 18261^2 + 9724^2 .

It is a cyclic number.

It is not a de Polignac number, because 428020297 - 2³ = 428020289 is a prime.

It is not a weakly prime, because it can be changed into another prime (428020207) 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, 214010148 + 214010149.

It is an arithmetic number, because the mean of its divisors is an integer number (214010149).

Almost surely, 2^428020297 is an apocalyptic number.

It is an amenable number.

428020297 is a deficient number, since it is larger than the sum of its proper divisors (1).

428020297 is an equidigital number, since it uses as much as digits as its factorization.

428020297 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 34.

The square root of 428020297 is about 20688.6514060245. The cubic root of 428020297 is about 753.6241169756.

The spelling of 428020297 in words is "four hundred twenty-eight million, twenty thousand, two hundred ninety-seven".