628533161 has 2 divisors, whose sum is σ = 628533162. Its totient is φ = 628533160.

The previous prime is 628533151. The next prime is 628533181. The reversal of 628533161 is 161335826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 628454761 + 78400 = 25069^2 + 280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628533161 is a prime.

It is not a weakly prime, because it can be changed into another prime (628533151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314266580 + 314266581.

It is an arithmetic number, because the mean of its divisors is an integer number (314266581).

Almost surely, 2^628533161 is an apocalyptic number.

It is an amenable number.

628533161 is a deficient number, since it is larger than the sum of its proper divisors (1).

628533161 is an equidigital number, since it uses as much as digits as its factorization.

628533161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 628533161 is about 25070.5636354670. The cubic root of 628533161 is about 856.5960457125.

Adding to 628533161 its reverse (161335826), we get a palindrome (789868987).

The spelling of 628533161 in words is "six hundred twenty-eight million, five hundred thirty-three thousand, one hundred sixty-one".