609900 has 72 divisors (see below), whose sum is σ = 1874880. Its totient is φ = 152640.

The previous prime is 609887. The next prime is 609907. The reversal of 609900 is 9906.

609900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (609907) by changing a digit.

609900 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 23 ways as a sum of consecutive naturals, for example, 5647 + ... + 5753.

It is an arithmetic number, because the mean of its divisors is an integer number (26040).

2⁶⁰⁹⁹⁰⁰ is an apocalyptic number.

609900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (937440).

609900 is an abundant number, since it is smaller than the sum of its proper divisors (1264980).

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

609900 is a wasteful number, since it uses less digits than its factorization.

609900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 609900 is about 780.9609465268. The cubic root of 609900 is about 84.8046262458.

The spelling of 609900 in words is "six hundred nine thousand, nine hundred".