628659223 has 2 divisors, whose sum is σ = 628659224. Its totient is φ = 628659222.

The previous prime is 628659221. The next prime is 628659233. The reversal of 628659223 is 322956826.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628659223 - 2¹ = 628659221 is a prime.

Together with 628659221, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 628659223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628659221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314329611 + 314329612.

It is an arithmetic number, because the mean of its divisors is an integer number (314329612).

Almost surely, 2^628659223 is an apocalyptic number.

628659223 is a deficient number, since it is larger than the sum of its proper divisors (1).

628659223 is an equidigital number, since it uses as much as digits as its factorization.

628659223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 43.

The square root of 628659223 is about 25073.0776531323. The cubic root of 628659223 is about 856.6533097249.

The spelling of 628659223 in words is "six hundred twenty-eight million, six hundred fifty-nine thousand, two hundred twenty-three".