609813 has 6 divisors (see below), whose sum is σ = 880854. Its totient is φ = 406536.

The previous prime is 609809. The next prime is 609821. The reversal of 609813 is 318906.

It can be written as a sum of positive squares in only one way, i.e., 603729 + 6084 = 777^2 + 78^2 .

It is not a de Polignac number, because 609813 - 2² = 609809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33870 + ... + 33887.

It is an arithmetic number, because the mean of its divisors is an integer number (146809).

2⁶⁰⁹⁸¹³ is an apocalyptic number.

It is an amenable number.

609813 is a deficient number, since it is larger than the sum of its proper divisors (271041).

609813 is a wasteful number, since it uses less digits than its factorization.

609813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67763 (or 67760 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 609813 is about 780.9052439317. The cubic root of 609813 is about 84.8005936976.

The spelling of 609813 in words is "six hundred nine thousand, eight hundred thirteen".