609705813 has 8 divisors (see below), whose sum is σ = 813765376. Its totient is φ = 406058400.

The previous prime is 609705809. The next prime is 609705821. The reversal of 609705813 is 318507906.

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

It is not a de Polignac number, because 609705813 - 2² = 609705809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609705893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99568 + ... + 105513.

It is an arithmetic number, because the mean of its divisors is an integer number (101720672).

Almost surely, 2^609705813 is an apocalyptic number.

It is an amenable number.

609705813 is a deficient number, since it is larger than the sum of its proper divisors (204059563).

609705813 is a wasteful number, since it uses less digits than its factorization.

609705813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206075.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 609705813 is about 24692.2217104901. The cubic root of 609705813 is about 847.9562493189.

The spelling of 609705813 in words is "six hundred nine million, seven hundred five thousand, eight hundred thirteen".