629961 has 4 divisors (see below), whose sum is σ = 839952. Its totient is φ = 419972.

The previous prime is 629939. The next prime is 629963. The reversal of 629961 is 169926.

It is a happy number.

629961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 629961 - 2⁵ = 629929 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 629961.

It is not an unprimeable number, because it can be changed into a prime (629963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104991 + ... + 104996.

It is an arithmetic number, because the mean of its divisors is an integer number (209988).

2⁶²⁹⁹⁶¹ is an apocalyptic number.

It is an amenable number.

629961 is a deficient number, since it is larger than the sum of its proper divisors (209991).

629961 is a wasteful number, since it uses less digits than its factorization.

629961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209990.

The product of its digits is 5832, while the sum is 33.

The square root of 629961 is about 793.7008252484. The cubic root of 629961 is about 85.7244198335.

The spelling of 629961 in words is "six hundred twenty-nine thousand, nine hundred sixty-one".