609988 has 12 divisors (see below), whose sum is σ = 1082620. Its totient is φ = 300672.

The previous prime is 609979. The next prime is 609989. The reversal of 609988 is 889906.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 451584 + 158404 = 672^2 + 398^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 609988.

It is not an unprimeable number, because it can be changed into a prime (609989) by changing a digit.

609988 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753 + ... + 1336.

2⁶⁰⁹⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

609988 is a deficient number, since it is larger than the sum of its proper divisors (472632).

609988 is a wasteful number, since it uses less digits than its factorization.

609988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166 (or 2164 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 609988 is about 781.0172853401. The cubic root of 609988 is about 84.8087047549.

The spelling of 609988 in words is "six hundred nine thousand, nine hundred eighty-eight".