1318478919 has 4 divisors (see below), whose sum is σ = 1757971896. Its totient is φ = 878985944.

The previous prime is 1318478899. The next prime is 1318478969. The reversal of 1318478919 is 9198748131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1318478919 - 2²⁴ = 1301701703 is a prime.

It is a super-3 number, since 3×1318478919³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318478969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219746484 + ... + 219746489.

It is an arithmetic number, because the mean of its divisors is an integer number (439492974).

Almost surely, 2^1318478919 is an apocalyptic number.

1318478919 is a deficient number, since it is larger than the sum of its proper divisors (439492977).

1318478919 is an equidigital number, since it uses as much as digits as its factorization.

1318478919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439492976.

The product of its digits is 435456, while the sum is 51.

The square root of 1318478919 is about 36310.8650268759. The cubic root of 1318478919 is about 1096.5397932306.

The spelling of 1318478919 in words is "one billion, three hundred eighteen million, four hundred seventy-eight thousand, nine hundred nineteen".