628633897 has 2 divisors, whose sum is σ = 628633898. Its totient is φ = 628633896.

The previous prime is 628633793. The next prime is 628633927. The reversal of 628633897 is 798336826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 580039056 + 48594841 = 24084^2 + 6971^2 .

It is a cyclic number.

It is not a de Polignac number, because 628633897 - 2¹¹ = 628631849 is a prime.

It is not a weakly prime, because it can be changed into another prime (628633697) 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, 314316948 + 314316949.

It is an arithmetic number, because the mean of its divisors is an integer number (314316949).

Almost surely, 2^628633897 is an apocalyptic number.

It is an amenable number.

628633897 is a deficient number, since it is larger than the sum of its proper divisors (1).

628633897 is an equidigital number, since it uses as much as digits as its factorization.

628633897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 52.

The square root of 628633897 is about 25072.5726043420. The cubic root of 628633897 is about 856.6418059339.

The spelling of 628633897 in words is "six hundred twenty-eight million, six hundred thirty-three thousand, eight hundred ninety-seven".