629985929 has 2 divisors, whose sum is σ = 629985930. Its totient is φ = 629985928.

The previous prime is 629985919. The next prime is 629985953. The reversal of 629985929 is 929589926.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 480486400 + 149499529 = 21920^2 + 12227^2 .

It is a cyclic number.

It is not a de Polignac number, because 629985929 - 2⁸ = 629985673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (629985919) 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, 314992964 + 314992965.

It is an arithmetic number, because the mean of its divisors is an integer number (314992965).

Almost surely, 2^629985929 is an apocalyptic number.

It is an amenable number.

629985929 is a deficient number, since it is larger than the sum of its proper divisors (1).

629985929 is an equidigital number, since it uses as much as digits as its factorization.

629985929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6298560, while the sum is 59.

The square root of 629985929 is about 25099.5204934278. The cubic root of 629985929 is about 857.2555058917.

The spelling of 629985929 in words is "six hundred twenty-nine million, nine hundred eighty-five thousand, nine hundred twenty-nine".