629807813 has 2 divisors, whose sum is σ = 629807814. Its totient is φ = 629807812.

The previous prime is 629807807. The next prime is 629807833. The reversal of 629807813 is 318708926.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 596434084 + 33373729 = 24422^2 + 5777^2 .

It is a cyclic number.

It is not a de Polignac number, because 629807813 - 2⁴ = 629807797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (629807803) 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, 314903906 + 314903907.

It is an arithmetic number, because the mean of its divisors is an integer number (314903907).

Almost surely, 2^629807813 is an apocalyptic number.

It is an amenable number.

629807813 is a deficient number, since it is larger than the sum of its proper divisors (1).

629807813 is an equidigital number, since it uses as much as digits as its factorization.

629807813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 629807813 is about 25095.9720473227. The cubic root of 629807813 is about 857.1747076247.

The spelling of 629807813 in words is "six hundred twenty-nine million, eight hundred seven thousand, eight hundred thirteen".