630646439 has 2 divisors, whose sum is σ = 630646440. Its totient is φ = 630646438.

The previous prime is 630646427. The next prime is 630646451. The reversal of 630646439 is 934646036.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (630646427) and next prime (630646451).

It is a cyclic number.

It is not a de Polignac number, because 630646439 - 2²⁰ = 629597863 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 630646396 and 630646405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630646409) 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, 315323219 + 315323220.

It is an arithmetic number, because the mean of its divisors is an integer number (315323220).

Almost surely, 2^630646439 is an apocalyptic number.

630646439 is a deficient number, since it is larger than the sum of its proper divisors (1).

630646439 is an equidigital number, since it uses as much as digits as its factorization.

630646439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 41.

The square root of 630646439 is about 25112.6748674847. The cubic root of 630646439 is about 857.5549983282.

The spelling of 630646439 in words is "six hundred thirty million, six hundred forty-six thousand, four hundred thirty-nine".