630205123 has 2 divisors, whose sum is σ = 630205124. Its totient is φ = 630205122.

The previous prime is 630205117. The next prime is 630205151. The reversal of 630205123 is 321502036.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630205123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 630205094 and 630205103.

It is not a weakly prime, because it can be changed into another prime (630205223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315102561 + 315102562.

It is an arithmetic number, because the mean of its divisors is an integer number (315102562).

Almost surely, 2^630205123 is an apocalyptic number.

630205123 is a deficient number, since it is larger than the sum of its proper divisors (1).

630205123 is an equidigital number, since it uses as much as digits as its factorization.

630205123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 630205123 is about 25103.8866114393. The cubic root of 630205123 is about 857.3549173579.

Adding to 630205123 its reverse (321502036), we get a palindrome (951707159).

The spelling of 630205123 in words is "six hundred thirty million, two hundred five thousand, one hundred twenty-three".