428051773 has 2 divisors, whose sum is σ = 428051774. Its totient is φ = 428051772.

The previous prime is 428051761. The next prime is 428051777. The reversal of 428051773 is 377150824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 410386564 + 17665209 = 20258^2 + 4203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428051773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428051777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214025886 + 214025887.

It is an arithmetic number, because the mean of its divisors is an integer number (214025887).

Almost surely, 2^428051773 is an apocalyptic number.

It is an amenable number.

428051773 is a deficient number, since it is larger than the sum of its proper divisors (1).

428051773 is an equidigital number, since it uses as much as digits as its factorization.

428051773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 428051773 is about 20689.4120989457. The cubic root of 428051773 is about 753.6425900024.

It can be divided in two parts, 428051 and 773, that added together give a palindrome (428824).

The spelling of 428051773 in words is "four hundred twenty-eight million, fifty-one thousand, seven hundred seventy-three".