519681972347 has 2 divisors, whose sum is σ = 519681972348. Its totient is φ = 519681972346.

The previous prime is 519681972343. The next prime is 519681972361. The reversal of 519681972347 is 743279186915.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 519681972347 - 2² = 519681972343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 519681972347.

It is not a weakly prime, because it can be changed into another prime (519681972343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259840986173 + 259840986174.

It is an arithmetic number, because the mean of its divisors is an integer number (259840986174).

Almost surely, 2^519681972347 is an apocalyptic number.

519681972347 is a deficient number, since it is larger than the sum of its proper divisors (1).

519681972347 is an equidigital number, since it uses as much as digits as its factorization.

519681972347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 62.

The spelling of 519681972347 in words is "five hundred nineteen billion, six hundred eighty-one million, nine hundred seventy-two thousand, three hundred forty-seven".