629669 has 4 divisors (see below), whose sum is σ = 633696. Its totient is φ = 625644.

The previous prime is 629653. The next prime is 629683. The reversal of 629669 is 966926.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 629669 - 2⁴ = 629653 is a prime.

It is a super-2 number, since 2×629669² = 792966099122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1769 + ... + 2094.

It is an arithmetic number, because the mean of its divisors is an integer number (158424).

2⁶²⁹⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

629669 is a deficient number, since it is larger than the sum of its proper divisors (4027).

629669 is a wasteful number, since it uses less digits than its factorization.

629669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026.

The product of its digits is 34992, while the sum is 38.

The square root of 629669 is about 793.5168555236. The cubic root of 629669 is about 85.7111727705.

The spelling of 629669 in words is "six hundred twenty-nine thousand, six hundred sixty-nine".