629509 has 2 divisors, whose sum is σ = 629510. Its totient is φ = 629508.

The previous prime is 629491. The next prime is 629513. The reversal of 629509 is 905926.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 567009 + 62500 = 753^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 629509 - 2⁷ = 629381 is a prime.

It is a Chen prime.

629509 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (629569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314754 + 314755.

It is an arithmetic number, because the mean of its divisors is an integer number (314755).

2⁶²⁹⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

629509 is a deficient number, since it is larger than the sum of its proper divisors (1).

629509 is an equidigital number, since it uses as much as digits as its factorization.

629509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 629509 is about 793.4160321042. The cubic root of 629509 is about 85.7039123690.

The spelling of 629509 in words is "six hundred twenty-nine thousand, five hundred nine".