516321913 has 2 divisors, whose sum is σ = 516321914. Its totient is φ = 516321912.

The previous prime is 516321907. The next prime is 516321989. The reversal of 516321913 is 319123615.

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., 346071609 + 170250304 = 18603^2 + 13048^2 .

It is a cyclic number.

It is not a de Polignac number, because 516321913 - 2⁹ = 516321401 is a prime.

It is not a weakly prime, because it can be changed into another prime (516321313) 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, 258160956 + 258160957.

It is an arithmetic number, because the mean of its divisors is an integer number (258160957).

Almost surely, 2^516321913 is an apocalyptic number.

It is an amenable number.

516321913 is a deficient number, since it is larger than the sum of its proper divisors (1).

516321913 is an equidigital number, since it uses as much as digits as its factorization.

516321913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 31.

The square root of 516321913 is about 22722.7179932331. The cubic root of 516321913 is about 802.2446921598.

The spelling of 516321913 in words is "five hundred sixteen million, three hundred twenty-one thousand, nine hundred thirteen".