616161613 has 2 divisors, whose sum is σ = 616161614. Its totient is φ = 616161612.

The previous prime is 616161599. The next prime is 616161619. The reversal of 616161613 is 316161616.

616161613 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., 616131684 + 29929 = 24822^2 + 173^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616161613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616161619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308080806 + 308080807.

It is an arithmetic number, because the mean of its divisors is an integer number (308080807).

Almost surely, 2^616161613 is an apocalyptic number.

It is an amenable number.

616161613 is a deficient number, since it is larger than the sum of its proper divisors (1).

616161613 is an equidigital number, since it uses as much as digits as its factorization.

616161613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 616161613 is about 24822.6028651308. The cubic root of 616161613 is about 850.9385770748.

The spelling of 616161613 in words is "six hundred sixteen million, one hundred sixty-one thousand, six hundred thirteen".