628630069 has 2 divisors, whose sum is σ = 628630070. Its totient is φ = 628630068.

The previous prime is 628630049. The next prime is 628630091. The reversal of 628630069 is 960036826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 628153969 + 476100 = 25063^2 + 690^2 .

It is a cyclic number.

It is not a de Polignac number, because 628630069 - 2⁷ = 628629941 is a prime.

It is a super-2 number, since 2×628630069² = 790351527301889522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628630019) 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, 314315034 + 314315035.

It is an arithmetic number, because the mean of its divisors is an integer number (314315035).

Almost surely, 2^628630069 is an apocalyptic number.

It is an amenable number.

628630069 is a deficient number, since it is larger than the sum of its proper divisors (1).

628630069 is an equidigital number, since it uses as much as digits as its factorization.

628630069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 628630069 is about 25072.4962658288. The cubic root of 628630069 is about 856.6400671203.

The spelling of 628630069 in words is "six hundred twenty-eight million, six hundred thirty thousand, sixty-nine".