516601999 has 2 divisors, whose sum is σ = 516602000. Its totient is φ = 516601998.

The previous prime is 516601997. The next prime is 516602017. The reversal of 516601999 is 999106615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 516601999 - 2¹ = 516601997 is a prime.

Together with 516601997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516601991) 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, 258300999 + 258301000.

It is an arithmetic number, because the mean of its divisors is an integer number (258301000).

Almost surely, 2^516601999 is an apocalyptic number.

516601999 is a deficient number, since it is larger than the sum of its proper divisors (1).

516601999 is an equidigital number, since it uses as much as digits as its factorization.

516601999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131220, while the sum is 46.

The square root of 516601999 is about 22728.8802847831. The cubic root of 516601999 is about 802.3897288661.

The spelling of 516601999 in words is "five hundred sixteen million, six hundred one thousand, nine hundred ninety-nine".