628717589 has 2 divisors, whose sum is σ = 628717590. Its totient is φ = 628717588.

The previous prime is 628717553. The next prime is 628717693. The reversal of 628717589 is 985717826.

628717589 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., 552015025 + 76702564 = 23495^2 + 8758^2 .

It is a cyclic number.

It is not a de Polignac number, because 628717589 - 2²⁰ = 627669013 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 628717589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628719589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314358794 + 314358795.

It is an arithmetic number, because the mean of its divisors is an integer number (314358795).

Almost surely, 2^628717589 is an apocalyptic number.

It is an amenable number.

628717589 is a deficient number, since it is larger than the sum of its proper divisors (1).

628717589 is an equidigital number, since it uses as much as digits as its factorization.

628717589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 53.

The square root of 628717589 is about 25074.2415438633. The cubic root of 628717589 is about 856.6798200493.

The spelling of 628717589 in words is "six hundred twenty-eight million, seven hundred seventeen thousand, five hundred eighty-nine".