321130613 has 2 divisors, whose sum is σ = 321130614. Its totient is φ = 321130612.

The previous prime is 321130597. The next prime is 321130631. The reversal of 321130613 is 316031123.

It is a happy number.

Together with next prime (321130631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296459524 + 24671089 = 17218^2 + 4967^2 .

It is a cyclic number.

It is not a de Polignac number, because 321130613 - 2⁴ = 321130597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321130673) 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 as a sum of consecutive naturals, namely, 160565306 + 160565307.

It is an arithmetic number, because the mean of its divisors is an integer number (160565307).

Almost surely, 2^321130613 is an apocalyptic number.

It is an amenable number.

321130613 is a deficient number, since it is larger than the sum of its proper divisors (1).

321130613 is an equidigital number, since it uses as much as digits as its factorization.

321130613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 321130613 is about 17920.1175498377. The cubic root of 321130613 is about 684.7949822454.

Adding to 321130613 its reverse (316031123), we get a palindrome (637161736).

The spelling of 321130613 in words is "three hundred twenty-one million, one hundred thirty thousand, six hundred thirteen".