516817947 has 8 divisors (see below), whose sum is σ = 689580544. Its totient is φ = 344300328.

The previous prime is 516817943. The next prime is 516818039. The reversal of 516817947 is 749718615.

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

It is not a de Polignac number, because 516817947 - 2² = 516817943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 516817896 and 516817905.

It is not an unprimeable number, because it can be changed into a prime (516817943) 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, 56263 + ... + 64800.

It is an arithmetic number, because the mean of its divisors is an integer number (86197568).

Almost surely, 2^516817947 is an apocalyptic number.

516817947 is a deficient number, since it is larger than the sum of its proper divisors (172762597).

516817947 is a wasteful number, since it uses less digits than its factorization.

516817947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122489.

The product of its digits is 423360, while the sum is 48.

The square root of 516817947 is about 22733.6303084219. The cubic root of 516817947 is about 802.5015172573.

The spelling of 516817947 in words is "five hundred sixteen million, eight hundred seventeen thousand, nine hundred forty-seven".