321130609 has 4 divisors (see below), whose sum is σ = 338032240. Its totient is φ = 304228980.

The previous prime is 321130597. The next prime is 321130613. The reversal of 321130609 is 906031123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 321130609 - 2¹⁵ = 321097841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321130679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8450787 + ... + 8450824.

It is an arithmetic number, because the mean of its divisors is an integer number (84508060).

Almost surely, 2^321130609 is an apocalyptic number.

It is an amenable number.

321130609 is a deficient number, since it is larger than the sum of its proper divisors (16901631).

321130609 is a wasteful number, since it uses less digits than its factorization.

321130609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16901630.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 321130609 is about 17920.1174382313. The cubic root of 321130609 is about 684.7949794021.

The spelling of 321130609 in words is "three hundred twenty-one million, one hundred thirty thousand, six hundred nine".