613021361 has 2 divisors, whose sum is σ = 613021362. Its totient is φ = 613021360.

The previous prime is 613021351. The next prime is 613021363. The reversal of 613021361 is 163120316.

It is a happy number.

613021361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 382437136 + 230584225 = 19556^2 + 15185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-613021361 is a prime.

Together with 613021363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (613021363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306510680 + 306510681.

It is an arithmetic number, because the mean of its divisors is an integer number (306510681).

Almost surely, 2^613021361 is an apocalyptic number.

It is an amenable number.

613021361 is a deficient number, since it is larger than the sum of its proper divisors (1).

613021361 is an equidigital number, since it uses as much as digits as its factorization.

613021361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 613021361 is about 24759.2681838539. The cubic root of 613021361 is about 849.4905186739.

Adding to 613021361 its reverse (163120316), we get a palindrome (776141677).

The spelling of 613021361 in words is "six hundred thirteen million, twenty-one thousand, three hundred sixty-one".