516870685 has 4 divisors (see below), whose sum is σ = 620244828. Its totient is φ = 413496544.

The previous prime is 516870677. The next prime is 516870691. The reversal of 516870685 is 586078615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 586078615 = 5 ⋅117215723.

It can be written as a sum of positive squares in 2 ways, for example, as 281769796 + 235100889 = 16786^2 + 15333^2 .

It is a cyclic number.

It is not a de Polignac number, because 516870685 - 2³ = 516870677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 51687064 + ... + 51687073.

It is an arithmetic number, because the mean of its divisors is an integer number (155061207).

Almost surely, 2^516870685 is an apocalyptic number.

It is an amenable number.

516870685 is a deficient number, since it is larger than the sum of its proper divisors (103374143).

516870685 is a wasteful number, since it uses less digits than its factorization.

516870685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103374142.

The product of its (nonzero) digits is 403200, while the sum is 46.

The square root of 516870685 is about 22734.7901903668. The cubic root of 516870685 is about 802.5288130621.

The spelling of 516870685 in words is "five hundred sixteen million, eight hundred seventy thousand, six hundred eighty-five".