630689929 has 2 divisors, whose sum is σ = 630689930. Its totient is φ = 630689928.

The previous prime is 630689911. The next prime is 630689957. The reversal of 630689929 is 929986036.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 564300025 + 66389904 = 23755^2 + 8148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630689929 is a prime.

It is not a weakly prime, because it can be changed into another prime (630689989) 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, 315344964 + 315344965.

It is an arithmetic number, because the mean of its divisors is an integer number (315344965).

Almost surely, 2^630689929 is an apocalyptic number.

It is an amenable number.

630689929 is a deficient number, since it is larger than the sum of its proper divisors (1).

630689929 is an equidigital number, since it uses as much as digits as its factorization.

630689929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 630689929 is about 25113.5407499620. The cubic root of 630689929 is about 857.5747104878.

The spelling of 630689929 in words is "six hundred thirty million, six hundred eighty-nine thousand, nine hundred twenty-nine".