628755601 has 2 divisors, whose sum is σ = 628755602. Its totient is φ = 628755600.

The previous prime is 628755587. The next prime is 628755629. The reversal of 628755601 is 106557826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 576048001 + 52707600 = 24001^2 + 7260^2 .

It is a cyclic number.

It is not a de Polignac number, because 628755601 - 2²⁵ = 595201169 is a prime.

It is not a weakly prime, because it can be changed into another prime (628758601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314377800 + 314377801.

It is an arithmetic number, because the mean of its divisors is an integer number (314377801).

Almost surely, 2^628755601 is an apocalyptic number.

It is an amenable number.

628755601 is a deficient number, since it is larger than the sum of its proper divisors (1).

628755601 is an equidigital number, since it uses as much as digits as its factorization.

628755601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 628755601 is about 25074.9995214357. Note that the first 3 decimals coincide. The cubic root of 628755601 is about 856.6970845348.

The spelling of 628755601 in words is "six hundred twenty-eight million, seven hundred fifty-five thousand, six hundred one".