609969906 has 128 divisors (see below), whose sum is σ = 1686182400. Its totient is φ = 159148800.

The previous prime is 609969839. The next prime is 609969917.

609969906 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 495700 + ... + 496928.

It is an arithmetic number, because the mean of its divisors is an integer number (13173300).

Almost surely, 2^609969906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609969906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (843091200).

609969906 is an abundant number, since it is smaller than the sum of its proper divisors (1076212494).

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

609969906 is a wasteful number, since it uses less digits than its factorization.

609969906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361 (or 1355 counting only the distinct ones).

The product of its (nonzero) digits is 1417176, while the sum is 54.

The square root of 609969906 is about 24697.5688277207. The cubic root of 609969906 is about 848.0786618987.

The spelling of 609969906 in words is "six hundred nine million, nine hundred sixty-nine thousand, nine hundred six".