628511801 has 2 divisors, whose sum is σ = 628511802. Its totient is φ = 628511800.

The previous prime is 628511759. The next prime is 628511813. The reversal of 628511801 is 108115826.

628511801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 389036176 + 239475625 = 19724^2 + 15475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628511801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (628511831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314255900 + 314255901.

It is an arithmetic number, because the mean of its divisors is an integer number (314255901).

Almost surely, 2^628511801 is an apocalyptic number.

It is an amenable number.

628511801 is a deficient number, since it is larger than the sum of its proper divisors (1).

628511801 is an equidigital number, since it uses as much as digits as its factorization.

628511801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 32.

The square root of 628511801 is about 25070.1376342452. The cubic root of 628511801 is about 856.5863421148.

The spelling of 628511801 in words is "six hundred twenty-eight million, five hundred eleven thousand, eight hundred one".