629909 has 12 divisors (see below), whose sum is σ = 752544. Its totient is φ = 516432.

The previous prime is 629903. The next prime is 629921. The reversal of 629909 is 909926.

629909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 629909 - 2⁸ = 629653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5834 + ... + 5940.

It is an arithmetic number, because the mean of its divisors is an integer number (62712).

2⁶²⁹⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

629909 is a deficient number, since it is larger than the sum of its proper divisors (122635).

629909 is a wasteful number, since it uses less digits than its factorization.

629909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 629909 is about 793.6680666374. The cubic root of 629909 is about 85.7220610671.

The spelling of 629909 in words is "six hundred twenty-nine thousand, nine hundred nine".