630561653 has 2 divisors, whose sum is σ = 630561654. Its totient is φ = 630561652.

The previous prime is 630561649. The next prime is 630561677. The reversal of 630561653 is 356165036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 629859409 + 702244 = 25097^2 + 838^2 .

It is a cyclic number.

It is not a de Polignac number, because 630561653 - 2² = 630561649 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630561643) 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, 315280826 + 315280827.

It is an arithmetic number, because the mean of its divisors is an integer number (315280827).

Almost surely, 2^630561653 is an apocalyptic number.

It is an amenable number.

630561653 is a deficient number, since it is larger than the sum of its proper divisors (1).

630561653 is an equidigital number, since it uses as much as digits as its factorization.

630561653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 35.

The square root of 630561653 is about 25110.9866990527. The cubic root of 630561653 is about 857.5165658500.

The spelling of 630561653 in words is "six hundred thirty million, five hundred sixty-one thousand, six hundred fifty-three".