629906 has 4 divisors (see below), whose sum is σ = 944862. Its totient is φ = 314952.

The previous prime is 629903. The next prime is 629921. The reversal of 629906 is 609926.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 625681 + 4225 = 791^2 + 65^2 .

It is an Ulam 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 as a sum of consecutive naturals, namely, 157475 + ... + 157478.

2⁶²⁹⁹⁰⁶ is an apocalyptic number.

629906 is a deficient number, since it is larger than the sum of its proper divisors (314956).

629906 is a wasteful number, since it uses less digits than its factorization.

629906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314955.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 629906 is about 793.6661766763. Note that the first 3 decimals coincide. The cubic root of 629906 is about 85.7219249805.

The spelling of 629906 in words is "six hundred twenty-nine thousand, nine hundred six".