628267897 has 2 divisors, whose sum is σ = 628267898. Its totient is φ = 628267896.

The previous prime is 628267879. The next prime is 628267973. The reversal of 628267897 is 798762826.

Together with previous prime (628267879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571401216 + 56866681 = 23904^2 + 7541^2 .

It is a cyclic number.

It is not a de Polignac number, because 628267897 - 2⁷ = 628267769 is a prime.

It is not a weakly prime, because it can be changed into another prime (628267097) 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, 314133948 + 314133949.

It is an arithmetic number, because the mean of its divisors is an integer number (314133949).

Almost surely, 2^628267897 is an apocalyptic number.

It is an amenable number.

628267897 is a deficient number, since it is larger than the sum of its proper divisors (1).

628267897 is an equidigital number, since it uses as much as digits as its factorization.

628267897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 55.

The square root of 628267897 is about 25065.2727294159. The cubic root of 628267897 is about 856.4755237943.

The spelling of 628267897 in words is "six hundred twenty-eight million, two hundred sixty-seven thousand, eight hundred ninety-seven".