609138 has 24 divisors (see below), whose sum is σ = 1352208. Its totient is φ = 198072.

The previous prime is 609113. The next prime is 609143. The reversal of 609138 is 831906.

609138 = 137² + 138² + ... + 163².

609138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 609138.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 381 + ... + 1167.

It is an arithmetic number, because the mean of its divisors is an integer number (56342).

2⁶⁰⁹¹³⁸ is an apocalyptic number.

609138 is an abundant number, since it is smaller than the sum of its proper divisors (743070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

609138 is a wasteful number, since it uses less digits than its factorization.

609138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838 (or 835 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 609138 is about 780.4729335473. The cubic root of 609138 is about 84.7692936469.

It can be divided in two parts, 609 and 138, that added together give a palindrome (747).

The spelling of 609138 in words is "six hundred nine thousand, one hundred thirty-eight".