629409 has 8 divisors (see below), whose sum is σ = 915552. Its totient is φ = 381440.

The previous prime is 629401. The next prime is 629411. The reversal of 629409 is 904926.

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 629409 - 2³ = 629401 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (629401) 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, 9504 + ... + 9569.

It is an arithmetic number, because the mean of its divisors is an integer number (114444).

2⁶²⁹⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

629409 is a deficient number, since it is larger than the sum of its proper divisors (286143).

629409 is a wasteful number, since it uses less digits than its factorization.

629409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19087.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 629409 is about 793.3530109604. The cubic root of 629409 is about 85.6993739933.

Subtracting from 629409 its product of nonzero digits (3888), we obtain a triangular number (625521 = T₁₁₁₈).

The spelling of 629409 in words is "six hundred twenty-nine thousand, four hundred nine".