518785349 has 2 divisors, whose sum is σ = 518785350. Its totient is φ = 518785348.

The previous prime is 518785313. The next prime is 518785363. The reversal of 518785349 is 943587815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 371332900 + 147452449 = 19270^2 + 12143^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-518785349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 518785297 and 518785306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518785049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259392674 + 259392675.

It is an arithmetic number, because the mean of its divisors is an integer number (259392675).

Almost surely, 2^518785349 is an apocalyptic number.

It is an amenable number.

518785349 is a deficient number, since it is larger than the sum of its proper divisors (1).

518785349 is an equidigital number, since it uses as much as digits as its factorization.

518785349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 50.

The square root of 518785349 is about 22776.8599460066. The cubic root of 518785349 is about 803.5185381120.

The spelling of 518785349 in words is "five hundred eighteen million, seven hundred eighty-five thousand, three hundred forty-nine".