1318948517 has 12 divisors (see below), whose sum is σ = 1395580140. Its totient is φ = 1246335552.

The previous prime is 1318948493. The next prime is 1318948531. The reversal of 1318948517 is 7158498131.

It can be written as a sum of positive squares in 2 ways, for example, as 811167361 + 507781156 = 28481^2 + 22534^2 .

It is not a de Polignac number, because 1318948517 - 2⁶ = 1318948453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318942517) 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 in 11 ways as a sum of consecutive naturals, for example, 143183 + ... + 152115.

It is an arithmetic number, because the mean of its divisors is an integer number (116298345).

Almost surely, 2^1318948517 is an apocalyptic number.

It is an amenable number.

1318948517 is a deficient number, since it is larger than the sum of its proper divisors (76631623).

1318948517 is an equidigital number, since it uses as much as digits as its factorization.

1318948517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9380 (or 9361 counting only the distinct ones).

The product of its digits is 241920, while the sum is 47.

The square root of 1318948517 is about 36317.3308077562. The cubic root of 1318948517 is about 1096.6699613520.

The spelling of 1318948517 in words is "one billion, three hundred eighteen million, nine hundred forty-eight thousand, five hundred seventeen".