516709 has 2 divisors, whose sum is σ = 516710. Its totient is φ = 516708.

The previous prime is 516701. The next prime is 516713. The reversal of 516709 is 907615.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 494209 + 22500 = 703^2 + 150^2 .

It is a cyclic number.

It is not a de Polignac number, because 516709 - 2³ = 516701 is a prime.

It is an Ulam number.

516709 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258354 + 258355.

It is an arithmetic number, because the mean of its divisors is an integer number (258355).

2⁵¹⁶⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

516709 is a deficient number, since it is larger than the sum of its proper divisors (1).

516709 is an equidigital number, since it uses as much as digits as its factorization.

516709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 516709 is about 718.8247352450. The cubic root of 516709 is about 80.2445123268.

It can be divided in two parts, 516 and 709, that added together give a triangular number (1225 = T₄₉).

The spelling of 516709 in words is "five hundred sixteen thousand, seven hundred nine".