628809143 has 2 divisors, whose sum is σ = 628809144. Its totient is φ = 628809142.

The previous prime is 628809127. The next prime is 628809211. The reversal of 628809143 is 341908826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628809143 - 2⁴ = 628809127 is a prime.

It is a Sophie Germain 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 628809143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628809343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314404571 + 314404572.

It is an arithmetic number, because the mean of its divisors is an integer number (314404572).

Almost surely, 2^628809143 is an apocalyptic number.

628809143 is a deficient number, since it is larger than the sum of its proper divisors (1).

628809143 is an equidigital number, since it uses as much as digits as its factorization.

628809143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 628809143 is about 25076.0671358170. The cubic root of 628809143 is about 856.7214013352.

The spelling of 628809143 in words is "six hundred twenty-eight million, eight hundred nine thousand, one hundred forty-three".