630724789 has 2 divisors, whose sum is σ = 630724790. Its totient is φ = 630724788.

The previous prime is 630724777. The next prime is 630724793. The reversal of 630724789 is 987427036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 612958564 + 17766225 = 24758^2 + 4215^2 .

It is a cyclic number.

It is not a de Polignac number, because 630724789 - 2²³ = 622336181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630724189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315362394 + 315362395.

It is an arithmetic number, because the mean of its divisors is an integer number (315362395).

Almost surely, 2^630724789 is an apocalyptic number.

It is an amenable number.

630724789 is a deficient number, since it is larger than the sum of its proper divisors (1).

630724789 is an equidigital number, since it uses as much as digits as its factorization.

630724789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 46.

The square root of 630724789 is about 25114.2347882630. The cubic root of 630724789 is about 857.5905103826.

The spelling of 630724789 in words is "six hundred thirty million, seven hundred twenty-four thousand, seven hundred eighty-nine".