428247773 has 2 divisors, whose sum is σ = 428247774. Its totient is φ = 428247772.

The previous prime is 428247761. The next prime is 428247803. The reversal of 428247773 is 377742824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 428200249 + 47524 = 20693^2 + 218^2 .

It is a cyclic number.

It is not a de Polignac number, because 428247773 - 2²⁰ = 427199197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428246773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214123886 + 214123887.

It is an arithmetic number, because the mean of its divisors is an integer number (214123887).

Almost surely, 2^428247773 is an apocalyptic number.

It is an amenable number.

428247773 is a deficient number, since it is larger than the sum of its proper divisors (1).

428247773 is an equidigital number, since it uses as much as digits as its factorization.

428247773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 526848, while the sum is 44.

The square root of 428247773 is about 20694.1482791634. The cubic root of 428247773 is about 753.7576005511.

The spelling of 428247773 in words is "four hundred twenty-eight million, two hundred forty-seven thousand, seven hundred seventy-three".