519820349 has 2 divisors, whose sum is σ = 519820350. Its totient is φ = 519820348.

The previous prime is 519820337. The next prime is 519820351. The reversal of 519820349 is 943028915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 487614724 + 32205625 = 22082^2 + 5675^2 .

It is a cyclic number.

It is not a de Polignac number, because 519820349 - 2¹⁶ = 519754813 is a prime.

It is a Sophie Germain prime.

Together with 519820351, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (519820319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259910174 + 259910175.

It is an arithmetic number, because the mean of its divisors is an integer number (259910175).

Almost surely, 2^519820349 is an apocalyptic number.

It is an amenable number.

519820349 is a deficient number, since it is larger than the sum of its proper divisors (1).

519820349 is an equidigital number, since it uses as much as digits as its factorization.

519820349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 519820349 is about 22799.5690529448. The cubic root of 519820349 is about 804.0525349738.

The spelling of 519820349 in words is "five hundred nineteen million, eight hundred twenty thousand, three hundred forty-nine".