628556503 has 2 divisors, whose sum is σ = 628556504. Its totient is φ = 628556502.

The previous prime is 628556491. The next prime is 628556507. The reversal of 628556503 is 305655826.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628556503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628556507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314278251 + 314278252.

It is an arithmetic number, because the mean of its divisors is an integer number (314278252).

Almost surely, 2^628556503 is an apocalyptic number.

628556503 is a deficient number, since it is larger than the sum of its proper divisors (1).

628556503 is an equidigital number, since it uses as much as digits as its factorization.

628556503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 40.

The square root of 628556503 is about 25071.0291571766. The cubic root of 628556503 is about 856.6066494582.

The spelling of 628556503 in words is "six hundred twenty-eight million, five hundred fifty-six thousand, five hundred three".