517219979 has 2 divisors, whose sum is σ = 517219980. Its totient is φ = 517219978.

The previous prime is 517219949. The next prime is 517219991. The reversal of 517219979 is 979912715.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-517219979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (517219909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258609989 + 258609990.

It is an arithmetic number, because the mean of its divisors is an integer number (258609990).

Almost surely, 2^517219979 is an apocalyptic number.

517219979 is a deficient number, since it is larger than the sum of its proper divisors (1).

517219979 is an equidigital number, since it uses as much as digits as its factorization.

517219979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 357210, while the sum is 50.

The square root of 517219979 is about 22742.4708200318. The cubic root of 517219979 is about 802.7095516143.

The spelling of 517219979 in words is "five hundred seventeen million, two hundred nineteen thousand, nine hundred seventy-nine".