518380497 has 12 divisors (see below), whose sum is σ = 751988484. Its totient is φ = 344102400.

The previous prime is 518380483. The next prime is 518380537. The reversal of 518380497 is 794083815.

518380497 is a `hidden beast` number, since 5 + 1 + 83 + 80 + 497 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 193515921 + 324864576 = 13911^2 + 18024^2 .

It is not a de Polignac number, because 518380497 - 2¹⁰ = 518379473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (518380427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121504 + ... + 125697.

It is an arithmetic number, because the mean of its divisors is an integer number (62665707).

Almost surely, 2^518380497 is an apocalyptic number.

It is an amenable number.

518380497 is a deficient number, since it is larger than the sum of its proper divisors (233607987).

518380497 is a wasteful number, since it uses less digits than its factorization.

518380497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247440 (or 247437 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 518380497 is about 22767.9708582034. The cubic root of 518380497 is about 803.3094659361.

The spelling of 518380497 in words is "five hundred eighteen million, three hundred eighty thousand, four hundred ninety-seven".