616573813 has 2 divisors, whose sum is σ = 616573814. Its totient is φ = 616573812.

The previous prime is 616573801. The next prime is 616573829. The reversal of 616573813 is 318375616.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 490976964 + 125596849 = 22158^2 + 11207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616573813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616579813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308286906 + 308286907.

It is an arithmetic number, because the mean of its divisors is an integer number (308286907).

Almost surely, 2^616573813 is an apocalyptic number.

It is an amenable number.

616573813 is a deficient number, since it is larger than the sum of its proper divisors (1).

616573813 is an equidigital number, since it uses as much as digits as its factorization.

616573813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 616573813 is about 24830.9043935174. The cubic root of 616573813 is about 851.1282885004.

The spelling of 616573813 in words is "six hundred sixteen million, five hundred seventy-three thousand, eight hundred thirteen".