629985 has 8 divisors (see below), whose sum is σ = 1008000. Its totient is φ = 335984.

The previous prime is 629977. The next prime is 629987. The reversal of 629985 is 589926.

It is a happy number.

629985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 629985 - 2³ = 629977 is a prime.

It is a super-2 number, since 2×629985² = 793762200450, which contains 22 as substring.

629985 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (629987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20985 + ... + 21014.

It is an arithmetic number, because the mean of its divisors is an integer number (126000).

2⁶²⁹⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

629985 is a deficient number, since it is larger than the sum of its proper divisors (378015).

629985 is a wasteful number, since it uses less digits than its factorization.

629985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42007.

The product of its digits is 38880, while the sum is 39.

The square root of 629985 is about 793.7159441513. The cubic root of 629985 is about 85.7255084512.

The spelling of 629985 in words is "six hundred twenty-nine thousand, nine hundred eighty-five".