629391 has 32 divisors (see below), whose sum is σ = 1064448. Its totient is φ = 322560.

The previous prime is 629383. The next prime is 629401. The reversal of 629391 is 193926.

It is not a de Polignac number, because 629391 - 2³ = 629383 is a prime.

It is a super-2 number, since 2×629391² = 792266061762, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

629391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629311) 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 31 ways as a sum of consecutive naturals, for example, 14616 + ... + 14658.

It is an arithmetic number, because the mean of its divisors is an integer number (33264).

2⁶²⁹³⁹¹ is an apocalyptic number.

629391 is a deficient number, since it is larger than the sum of its proper divisors (435057).

629391 is a wasteful number, since it uses less digits than its factorization.

629391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111.

The product of its digits is 2916, while the sum is 30.

The square root of 629391 is about 793.3416666229. The cubic root of 629391 is about 85.6985570346.

It can be divided in two parts, 62 and 9391, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 629391 in words is "six hundred twenty-nine thousand, three hundred ninety-one".