628604929 has 2 divisors, whose sum is σ = 628604930. Its totient is φ = 628604928.

The previous prime is 628604897. The next prime is 628604947. The reversal of 628604929 is 929406826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344176704 + 284428225 = 18552^2 + 16865^2 .

It is a cyclic number.

It is not a de Polignac number, because 628604929 - 2⁵ = 628604897 is a prime.

It is not a weakly prime, because it can be changed into another prime (628604129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314302464 + 314302465.

It is an arithmetic number, because the mean of its divisors is an integer number (314302465).

Almost surely, 2^628604929 is an apocalyptic number.

It is an amenable number.

628604929 is a deficient number, since it is larger than the sum of its proper divisors (1).

628604929 is an equidigital number, since it uses as much as digits as its factorization.

628604929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 628604929 is about 25071.9949146453. The cubic root of 628604929 is about 856.6286474638.

The spelling of 628604929 in words is "six hundred twenty-eight million, six hundred four thousand, nine hundred twenty-nine".