616807613 has 2 divisors, whose sum is σ = 616807614. Its totient is φ = 616807612.

The previous prime is 616807603. The next prime is 616807643. The reversal of 616807613 is 316708616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395333689 + 221473924 = 19883^2 + 14882^2 .

It is a cyclic number.

It is not a de Polignac number, because 616807613 - 2²⁶ = 549698749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616807603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308403806 + 308403807.

It is an arithmetic number, because the mean of its divisors is an integer number (308403807).

Almost surely, 2^616807613 is an apocalyptic number.

It is an amenable number.

616807613 is a deficient number, since it is larger than the sum of its proper divisors (1).

616807613 is an equidigital number, since it uses as much as digits as its factorization.

616807613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 616807613 is about 24835.6117903304. The cubic root of 616807613 is about 851.2358553170.

The spelling of 616807613 in words is "six hundred sixteen million, eight hundred seven thousand, six hundred thirteen".