428093789 has 2 divisors, whose sum is σ = 428093790. Its totient is φ = 428093788.

The previous prime is 428093777. The next prime is 428093851. The reversal of 428093789 is 987390824.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 428076100 + 17689 = 20690^2 + 133^2 .

It is a cyclic number.

It is not a de Polignac number, because 428093789 - 2¹² = 428089693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428093489) 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, 214046894 + 214046895.

It is an arithmetic number, because the mean of its divisors is an integer number (214046895).

Almost surely, 2^428093789 is an apocalyptic number.

It is an amenable number.

428093789 is a deficient number, since it is larger than the sum of its proper divisors (1).

428093789 is an equidigital number, since it uses as much as digits as its factorization.

428093789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 428093789 is about 20690.4274726261. The cubic root of 428093789 is about 753.6672474645.

The spelling of 428093789 in words is "four hundred twenty-eight million, ninety-three thousand, seven hundred eighty-nine".