613424321 has 2 divisors, whose sum is σ = 613424322. Its totient is φ = 613424320.

The previous prime is 613424297. The next prime is 613424323. The reversal of 613424321 is 123424316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504451600 + 108972721 = 22460^2 + 10439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-613424321 is a prime.

It is a super-2 number, since 2×613424321² = 752578795188622082, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 613424323, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (613424323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306712160 + 306712161.

It is an arithmetic number, because the mean of its divisors is an integer number (306712161).

Almost surely, 2^613424321 is an apocalyptic number.

It is an amenable number.

613424321 is a deficient number, since it is larger than the sum of its proper divisors (1).

613424321 is an equidigital number, since it uses as much as digits as its factorization.

613424321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 26.

The square root of 613424321 is about 24767.4044057911. The cubic root of 613424321 is about 849.6766110052.

Adding to 613424321 its reverse (123424316), we get a palindrome (736848637).

The spelling of 613424321 in words is "six hundred thirteen million, four hundred twenty-four thousand, three hundred twenty-one".