628604897 has 2 divisors, whose sum is σ = 628604898. Its totient is φ = 628604896.

The previous prime is 628604839. The next prime is 628604929. The reversal of 628604897 is 798406826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 514563856 + 114041041 = 22684^2 + 10679^2 .

It is a cyclic number.

It is not a de Polignac number, because 628604897 - 2⁶ = 628604833 is a prime.

It is not a weakly prime, because it can be changed into another prime (628604807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314302448 + 314302449.

It is an arithmetic number, because the mean of its divisors is an integer number (314302449).

Almost surely, 2^628604897 is an apocalyptic number.

It is an amenable number.

628604897 is a deficient number, since it is larger than the sum of its proper divisors (1).

628604897 is an equidigital number, since it uses as much as digits as its factorization.

628604897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The square root of 628604897 is about 25071.9942764831. The cubic root of 628604897 is about 856.6286329278.

The spelling of 628604897 in words is "six hundred twenty-eight million, six hundred four thousand, eight hundred ninety-seven".