630171617 has 2 divisors, whose sum is σ = 630171618. Its totient is φ = 630171616.

The previous prime is 630171611. The next prime is 630171671. The reversal of 630171617 is 716171036.

Together with next prime (630171671) 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., 595408801 + 34762816 = 24401^2 + 5896^2 .

It is a cyclic number.

It is not a de Polignac number, because 630171617 - 2¹⁸ = 629909473 is a prime.

It is not a weakly prime, because it can be changed into another prime (630171611) 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, 315085808 + 315085809.

It is an arithmetic number, because the mean of its divisors is an integer number (315085809).

Almost surely, 2^630171617 is an apocalyptic number.

It is an amenable number.

630171617 is a deficient number, since it is larger than the sum of its proper divisors (1).

630171617 is an equidigital number, since it uses as much as digits as its factorization.

630171617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 630171617 is about 25103.2192557050. The cubic root of 630171617 is about 857.3397228115.

The spelling of 630171617 in words is "six hundred thirty million, one hundred seventy-one thousand, six hundred seventeen".