517668308 has 6 divisors (see below), whose sum is σ = 905919546. Its totient is φ = 258834152.

The previous prime is 517668269. The next prime is 517668311. The reversal of 517668308 is 803866715.

It can be written as a sum of positive squares in only one way, i.e., 269353744 + 248314564 = 16412^2 + 15758^2 .

It is a super-4 number, since 4×517668308⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64708535 + ... + 64708542.

It is an arithmetic number, because the mean of its divisors is an integer number (150986591).

Almost surely, 2^517668308 is an apocalyptic number.

It is an amenable number.

517668308 is a deficient number, since it is larger than the sum of its proper divisors (388251238).

517668308 is a wasteful number, since it uses less digits than its factorization.

517668308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129417081 (or 129417079 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 517668308 is about 22752.3253317106. The cubic root of 517668308 is about 802.9414155883.

The spelling of 517668308 in words is "five hundred seventeen million, six hundred sixty-eight thousand, three hundred eight".