609591321 has 24 divisors (see below), whose sum is σ = 955065384. Its totient is φ = 373155840.

The previous prime is 609591313. The next prime is 609591331. The reversal of 609591321 is 123195906.

609591321 is a `hidden beast` number, since 60 + 9 + 591 + 3 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 104960025 + 504631296 = 10245^2 + 22464^2 .

It is not a de Polignac number, because 609591321 - 2³ = 609591313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (609591331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42316 + ... + 54861.

It is an arithmetic number, because the mean of its divisors is an integer number (39794391).

Almost surely, 2^609591321 is an apocalyptic number.

It is an amenable number.

609591321 is a deficient number, since it is larger than the sum of its proper divisors (345474063).

609591321 is a wasteful number, since it uses less digits than its factorization.

609591321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97241 (or 97238 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 609591321 is about 24689.9032197374. The cubic root of 609591321 is about 847.9031689193.

The spelling of 609591321 in words is "six hundred nine million, five hundred ninety-one thousand, three hundred twenty-one".