609117912 has 144 divisors (see below), whose sum is σ = 1806231960. Its totient is φ = 185342976.

The previous prime is 609117911. The next prime is 609117959. The reversal of 609117912 is 219711906.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609117911) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1374763 + ... + 1375205.

Almost surely, 2^609117912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609117912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (903115980).

609117912 is an abundant number, since it is smaller than the sum of its proper divisors (1197114048).

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

609117912 is a wasteful number, since it uses less digits than its factorization.

609117912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 36.

The square root of 609117912 is about 24680.3142605600. The cubic root of 609117912 is about 847.6836180318.

The spelling of 609117912 in words is "six hundred nine million, one hundred seventeen thousand, nine hundred twelve".