630584657 has 2 divisors, whose sum is σ = 630584658. Its totient is φ = 630584656.

The previous prime is 630584641. The next prime is 630584659. The reversal of 630584657 is 756485036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 458345281 + 172239376 = 21409^2 + 13124^2 .

It is a cyclic number.

It is not a de Polignac number, because 630584657 - 2⁴ = 630584641 is a prime.

Together with 630584659, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (630584659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315292328 + 315292329.

It is an arithmetic number, because the mean of its divisors is an integer number (315292329).

Almost surely, 2^630584657 is an apocalyptic number.

It is an amenable number.

630584657 is a deficient number, since it is larger than the sum of its proper divisors (1).

630584657 is an equidigital number, since it uses as much as digits as its factorization.

630584657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604800, while the sum is 44.

The square root of 630584657 is about 25111.4447413923. Note that the first 3 decimals coincide. The cubic root of 630584657 is about 857.5269936282.

The spelling of 630584657 in words is "six hundred thirty million, five hundred eighty-four thousand, six hundred fifty-seven".