516697647 has 8 divisors (see below), whose sum is σ = 725189760. Its totient is φ = 326335320.

The previous prime is 516697631. The next prime is 516697651. The reversal of 516697647 is 746796615.

It is a happy number.

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

It is not a de Polignac number, because 516697647 - 2⁴ = 516697631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 516697647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516697697) 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 in 7 ways as a sum of consecutive naturals, for example, 4532379 + ... + 4532492.

It is an arithmetic number, because the mean of its divisors is an integer number (90648720).

Almost surely, 2^516697647 is an apocalyptic number.

516697647 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

516697647 is a deficient number, since it is larger than the sum of its proper divisors (208492113).

516697647 is a wasteful number, since it uses less digits than its factorization.

516697647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9064893.

The product of its digits is 1905120, while the sum is 51.

The square root of 516697647 is about 22730.9842945703. The cubic root of 516697647 is about 802.4392461844.

The spelling of 516697647 in words is "five hundred sixteen million, six hundred ninety-seven thousand, six hundred forty-seven".