629839 has 4 divisors (see below), whose sum is σ = 719824. Its totient is φ = 539856.

The previous prime is 629819. The next prime is 629843. The reversal of 629839 is 938926.

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

It is a cyclic number.

It is not a de Polignac number, because 629839 - 2⁵ = 629807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 629798 and 629807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629819) 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, 44982 + ... + 44995.

It is an arithmetic number, because the mean of its divisors is an integer number (179956).

2⁶²⁹⁸³⁹ is an apocalyptic number.

629839 is a deficient number, since it is larger than the sum of its proper divisors (89985).

629839 is an equidigital number, since it uses as much as digits as its factorization.

629839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89984.

The product of its digits is 23328, while the sum is 37.

The square root of 629839 is about 793.6239663720. The cubic root of 629839 is about 85.7188855997.

The spelling of 629839 in words is "six hundred twenty-nine thousand, eight hundred thirty-nine".