630644057 has 2 divisors, whose sum is σ = 630644058. Its totient is φ = 630644056.

The previous prime is 630643997. The next prime is 630644071. The reversal of 630644057 is 750446036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 556063561 + 74580496 = 23581^2 + 8636^2 .

It is a cyclic number.

It is not a de Polignac number, because 630644057 - 2¹⁶ = 630578521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (630644857) 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, 315322028 + 315322029.

It is an arithmetic number, because the mean of its divisors is an integer number (315322029).

Almost surely, 2^630644057 is an apocalyptic number.

It is an amenable number.

630644057 is a deficient number, since it is larger than the sum of its proper divisors (1).

630644057 is an equidigital number, since it uses as much as digits as its factorization.

630644057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 630644057 is about 25112.6274411898. The cubic root of 630644057 is about 857.5539186432.

The spelling of 630644057 in words is "six hundred thirty million, six hundred forty-four thousand, fifty-seven".