609368809 has 8 divisors (see below), whose sum is σ = 697612608. Its totient is φ = 521422800.

The previous prime is 609368803. The next prime is 609368813. The reversal of 609368809 is 908863906.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 609368809 - 2⁹ = 609368297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (609368803) 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, 70042 + ... + 78259.

It is an arithmetic number, because the mean of its divisors is an integer number (87201576).

Almost surely, 2^609368809 is an apocalyptic number.

It is an amenable number.

609368809 is a deficient number, since it is larger than the sum of its proper divisors (88243799).

609368809 is a wasteful number, since it uses less digits than its factorization.

609368809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148895.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 609368809 is about 24685.3966749574. The cubic root of 609368809 is about 847.7999896341.

The spelling of 609368809 in words is "six hundred nine million, three hundred sixty-eight thousand, eight hundred nine".