609396813 has 12 divisors (see below), whose sum is σ = 880688380. Its totient is φ = 406057536.

The previous prime is 609396797. The next prime is 609396847. The reversal of 609396813 is 318693906.

609396813 is a `hidden beast` number, since 609 + 39 + 6 + 8 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 546717924 + 62678889 = 23382^2 + 7917^2 .

It is not a de Polignac number, because 609396813 - 2⁴ = 609396797 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 (609396863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2595 + ... + 35007.

Almost surely, 2^609396813 is an apocalyptic number.

It is an amenable number.

609396813 is a deficient number, since it is larger than the sum of its proper divisors (271291567).

609396813 is a wasteful number, since it uses less digits than its factorization.

609396813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34508 (or 34505 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 609396813 is about 24685.9638863869. The cubic root of 609396813 is about 847.8129765296.

The spelling of 609396813 in words is "six hundred nine million, three hundred ninety-six thousand, eight hundred thirteen".