520387349 has 2 divisors, whose sum is σ = 520387350. Its totient is φ = 520387348.

The previous prime is 520387321. The next prime is 520387369. The reversal of 520387349 is 943783025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 346332100 + 174055249 = 18610^2 + 13193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520387349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520387369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260193674 + 260193675.

It is an arithmetic number, because the mean of its divisors is an integer number (260193675).

Almost surely, 2^520387349 is an apocalyptic number.

It is an amenable number.

520387349 is a deficient number, since it is larger than the sum of its proper divisors (1).

520387349 is an equidigital number, since it uses as much as digits as its factorization.

520387349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 520387349 is about 22812.0001095914. Note that the first 3 decimals coincide. The cubic root of 520387349 is about 804.3447719168.

The spelling of 520387349 in words is "five hundred twenty million, three hundred eighty-seven thousand, three hundred forty-nine".