517828397 has 2 divisors, whose sum is σ = 517828398. Its totient is φ = 517828396.

The previous prime is 517828369. The next prime is 517828411. The reversal of 517828397 is 793828715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 490223881 + 27604516 = 22141^2 + 5254^2 .

It is a cyclic number.

It is not a de Polignac number, because 517828397 - 2¹⁴ = 517812013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (517828897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258914198 + 258914199.

It is an arithmetic number, because the mean of its divisors is an integer number (258914199).

Almost surely, 2^517828397 is an apocalyptic number.

It is an amenable number.

517828397 is a deficient number, since it is larger than the sum of its proper divisors (1).

517828397 is an equidigital number, since it uses as much as digits as its factorization.

517828397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 50.

The square root of 517828397 is about 22755.8431397301. The cubic root of 517828397 is about 803.0241769743.

The spelling of 517828397 in words is "five hundred seventeen million, eight hundred twenty-eight thousand, three hundred ninety-seven".