428631563 has 2 divisors, whose sum is σ = 428631564. Its totient is φ = 428631562.

The previous prime is 428631529. The next prime is 428631601. The reversal of 428631563 is 365136824.

It is an a-pointer prime, because the next prime (428631601) can be obtained adding 428631563 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428631563 - 2¹² = 428627467 is a prime.

It is a super-3 number, since 3×428631563³ (a number of 27 digits) contains 333 as substring.

It is equal to p_22779308 and since 428631563 and 22779308 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (428631163) 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, 214315781 + 214315782.

It is an arithmetic number, because the mean of its divisors is an integer number (214315782).

Almost surely, 2^428631563 is an apocalyptic number.

428631563 is a deficient number, since it is larger than the sum of its proper divisors (1).

428631563 is an equidigital number, since it uses as much as digits as its factorization.

428631563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 38.

The square root of 428631563 is about 20703.4191137599. The cubic root of 428631563 is about 753.9827025233.

The spelling of 428631563 in words is "four hundred twenty-eight million, six hundred thirty-one thousand, five hundred sixty-three".