516537689 has 8 divisors (see below), whose sum is σ = 519165000. Its totient is φ = 513916416.

The previous prime is 516537683. The next prime is 516537727. The reversal of 516537689 is 986735615.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 70694464 + 445843225 = 8408^2 + 21115^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 516537689 - 2⁸ = 516537433 is a prime.

It is a super-2 number, since 2×516537689² = 533622368314921442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516537683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345227 + ... + 346719.

It is an arithmetic number, because the mean of its divisors is an integer number (64895625).

Almost surely, 2^516537689 is an apocalyptic number.

It is an amenable number.

516537689 is a deficient number, since it is larger than the sum of its proper divisors (2627311).

516537689 is a wasteful number, since it uses less digits than its factorization.

516537689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019.

The product of its digits is 1360800, while the sum is 50.

The square root of 516537689 is about 22727.4655208186. The cubic root of 516537689 is about 802.3564319084.

The spelling of 516537689 in words is "five hundred sixteen million, five hundred thirty-seven thousand, six hundred eighty-nine".