518118949 has 2 divisors, whose sum is σ = 518118950. Its totient is φ = 518118948.

The previous prime is 518118883. The next prime is 518118967. The reversal of 518118949 is 949811815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318801025 + 199317924 = 17855^2 + 14118^2 .

It is a cyclic number.

It is not a de Polignac number, because 518118949 - 2¹³ = 518110757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 518118899 and 518118908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518118989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259059474 + 259059475.

It is an arithmetic number, because the mean of its divisors is an integer number (259059475).

Almost surely, 2^518118949 is an apocalyptic number.

It is an amenable number.

518118949 is a deficient number, since it is larger than the sum of its proper divisors (1).

518118949 is an equidigital number, since it uses as much as digits as its factorization.

518118949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 46.

The square root of 518118949 is about 22762.2263629901. The cubic root of 518118949 is about 803.1743403986.

The spelling of 518118949 in words is "five hundred eighteen million, one hundred eighteen thousand, nine hundred forty-nine".