630207121 has 2 divisors, whose sum is σ = 630207122. Its totient is φ = 630207120.

The previous prime is 630207103. The next prime is 630207133. The reversal of 630207121 is 121702036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 552767121 + 77440000 = 23511^2 + 8800^2 .

It is a cyclic number.

It is not a de Polignac number, because 630207121 - 2⁵ = 630207089 is a prime.

It is a super-2 number, since 2×630207121² = 794322030718217282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 630207092 and 630207101.

It is not a weakly prime, because it can be changed into another prime (630207821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315103560 + 315103561.

It is an arithmetic number, because the mean of its divisors is an integer number (315103561).

Almost surely, 2^630207121 is an apocalyptic number.

It is an amenable number.

630207121 is a deficient number, since it is larger than the sum of its proper divisors (1).

630207121 is an equidigital number, since it uses as much as digits as its factorization.

630207121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 630207121 is about 25103.9264060425. The cubic root of 630207121 is about 857.3558234086.

Adding to 630207121 its reverse (121702036), we get a palindrome (751909157).

The spelling of 630207121 in words is "six hundred thirty million, two hundred seven thousand, one hundred twenty-one".