609906 has 16 divisors (see below), whose sum is σ = 1330848. Its totient is φ = 184800.

The previous prime is 609887. The next prime is 609907.

609906 is nontrivially palindromic in base 10.

609906 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.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4555 + ... + 4686.

It is an arithmetic number, because the mean of its divisors is an integer number (83178).

2⁶⁰⁹⁹⁰⁶ is an apocalyptic number.

609906 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

609906 is an abundant number, since it is smaller than the sum of its proper divisors (720942).

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

609906 is a wasteful number, since it uses less digits than its factorization.

609906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9257.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 609906 is about 780.9647879386. The cubic root of 609906 is about 84.8049043384.

It can be divided in two parts, 60990 and 6, that multiplied together give a triangular number (365940 = T₈₅₅).

The spelling of 609906 in words is "six hundred nine thousand, nine hundred six".