629631 has 6 divisors (see below), whose sum is σ = 909480. Its totient is φ = 419748.

The previous prime is 629623. The next prime is 629653. The reversal of 629631 is 136926.

It is a happy number.

629631 is a `hidden beast` number, since 6 + 29 + 631 = 666.

It is not a de Polignac number, because 629631 - 2³ = 629623 is a prime.

It is a super-2 number, since 2×629631² = 792870392322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 629595 and 629604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34971 + ... + 34988.

It is an arithmetic number, because the mean of its divisors is an integer number (151580).

2⁶²⁹⁶³¹ is an apocalyptic number.

629631 is a deficient number, since it is larger than the sum of its proper divisors (279849).

629631 is a wasteful number, since it uses less digits than its factorization.

629631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69965 (or 69962 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 629631 is about 793.4929111215. The cubic root of 629631 is about 85.7094485365.

The spelling of 629631 in words is "six hundred twenty-nine thousand, six hundred thirty-one".