628815559 has 2 divisors, whose sum is σ = 628815560. Its totient is φ = 628815558.

The previous prime is 628815557. The next prime is 628815571. The reversal of 628815559 is 955518826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628815559 - 2¹ = 628815557 is a prime.

Together with 628815557, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628815557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314407779 + 314407780.

It is an arithmetic number, because the mean of its divisors is an integer number (314407780).

Almost surely, 2^628815559 is an apocalyptic number.

628815559 is a deficient number, since it is larger than the sum of its proper divisors (1).

628815559 is an equidigital number, since it uses as much as digits as its factorization.

628815559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864000, while the sum is 49.

The square root of 628815559 is about 25076.1950662376. The cubic root of 628815559 is about 856.7243151530.

The spelling of 628815559 in words is "six hundred twenty-eight million, eight hundred fifteen thousand, five hundred fifty-nine".