628969769 has 2 divisors, whose sum is σ = 628969770. Its totient is φ = 628969768.

The previous prime is 628969717. The next prime is 628969837. The reversal of 628969769 is 967969826.

628969769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 390576169 + 238393600 = 19763^2 + 15440^2 .

It is a cyclic number.

It is not a de Polignac number, because 628969769 - 2⁸ = 628969513 is a prime.

It is a super-2 number, since 2×628969769² = 791205940631826722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (628959769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314484884 + 314484885.

It is an arithmetic number, because the mean of its divisors is an integer number (314484885).

Almost surely, 2^628969769 is an apocalyptic number.

It is an amenable number.

628969769 is a deficient number, since it is larger than the sum of its proper divisors (1).

628969769 is an equidigital number, since it uses as much as digits as its factorization.

628969769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17635968, while the sum is 62.

The square root of 628969769 is about 25079.2697062733. The cubic root of 628969769 is about 856.7943434553.

The spelling of 628969769 in words is "six hundred twenty-eight million, nine hundred sixty-nine thousand, seven hundred sixty-nine".