428655673 has 2 divisors, whose sum is σ = 428655674. Its totient is φ = 428655672.

The previous prime is 428655593. The next prime is 428655727. The reversal of 428655673 is 376556824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376049664 + 52606009 = 19392^2 + 7253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428655673 is a prime.

It is not a weakly prime, because it can be changed into another prime (428655173) 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, 214327836 + 214327837.

It is an arithmetic number, because the mean of its divisors is an integer number (214327837).

Almost surely, 2^428655673 is an apocalyptic number.

It is an amenable number.

428655673 is a deficient number, since it is larger than the sum of its proper divisors (1).

428655673 is an equidigital number, since it uses as much as digits as its factorization.

428655673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 46.

The square root of 428655673 is about 20704.0013765455. The cubic root of 428655673 is about 753.9968391258.

The spelling of 428655673 in words is "four hundred twenty-eight million, six hundred fifty-five thousand, six hundred seventy-three".