616999517 has 2 divisors, whose sum is σ = 616999518. Its totient is φ = 616999516.

The previous prime is 616999501. The next prime is 616999589. The reversal of 616999517 is 715999616.

It is a happy number.

616999517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427083556 + 189915961 = 20666^2 + 13781^2 .

It is a cyclic number.

It is not a de Polignac number, because 616999517 - 2⁴ = 616999501 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616998517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308499758 + 308499759.

It is an arithmetic number, because the mean of its divisors is an integer number (308499759).

Almost surely, 2^616999517 is an apocalyptic number.

It is an amenable number.

616999517 is a deficient number, since it is larger than the sum of its proper divisors (1).

616999517 is an equidigital number, since it uses as much as digits as its factorization.

616999517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 53.

The square root of 616999517 is about 24839.4749743226. The cubic root of 616999517 is about 851.3241262915.

Subtracting 616999517 from its reverse (715999616), we obtain a palindrome (99000099).

The spelling of 616999517 in words is "six hundred sixteen million, nine hundred ninety-nine thousand, five hundred seventeen".