609129 has 12 divisors (see below), whose sum is σ = 897156. Its totient is φ = 398112.

The previous prime is 609113. The next prime is 609143. The reversal of 609129 is 921906.

It is a happy number.

609129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 419904 + 189225 = 648^2 + 435^2 .

It is not a de Polignac number, because 609129 - 2⁴ = 609113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (609149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162 + ... + 1115.

It is an arithmetic number, because the mean of its divisors is an integer number (74763).

2⁶⁰⁹¹²⁹ is an apocalyptic number.

It is an amenable number.

609129 is a deficient number, since it is larger than the sum of its proper divisors (288027).

609129 is a wasteful number, since it uses less digits than its factorization.

609129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336 (or 1333 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 609129 is about 780.4671677912. The cubic root of 609129 is about 84.7688761567.

The spelling of 609129 in words is "six hundred nine thousand, one hundred twenty-nine".