628198969 has 2 divisors, whose sum is σ = 628198970. Its totient is φ = 628198968.

The previous prime is 628198951. The next prime is 628199027. The reversal of 628198969 is 969891826.

628198969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (628199027) can be obtained adding 628198969 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 477204025 + 150994944 = 21845^2 + 12288^2 .

It is a cyclic number.

It is not a de Polignac number, because 628198969 - 2²⁵ = 594644537 is a prime.

It is a super-2 number, since 2×628198969² = 789267889305325922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (628168969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314099484 + 314099485.

It is an arithmetic number, because the mean of its divisors is an integer number (314099485).

Almost surely, 2^628198969 is an apocalyptic number.

It is an amenable number.

628198969 is a deficient number, since it is larger than the sum of its proper divisors (1).

628198969 is an equidigital number, since it uses as much as digits as its factorization.

628198969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 58.

The square root of 628198969 is about 25063.8977216234. The cubic root of 628198969 is about 856.4442010077. Note that the first 3 decimals are identical.

The spelling of 628198969 in words is "six hundred twenty-eight million, one hundred ninety-eight thousand, nine hundred sixty-nine".