1317327979 has 4 divisors (see below), whose sum is σ = 1437085080. Its totient is φ = 1197570880.

The previous prime is 1317327971. The next prime is 1317328003. The reversal of 1317327979 is 9797237131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9797237131 = 11 ⋅890657921.

It is not a de Polignac number, because 1317327979 - 2³ = 1317327971 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1317327971) 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, 59878534 + ... + 59878555.

It is an arithmetic number, because the mean of its divisors is an integer number (359271270).

Almost surely, 2^1317327979 is an apocalyptic number.

1317327979 is a deficient number, since it is larger than the sum of its proper divisors (119757101).

1317327979 is a wasteful number, since it uses less digits than its factorization.

1317327979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119757100.

The product of its digits is 500094, while the sum is 49.

The square root of 1317327979 is about 36295.0131423037. The cubic root of 1317327979 is about 1096.2206327958.

The spelling of 1317327979 in words is "one billion, three hundred seventeen million, three hundred twenty-seven thousand, nine hundred seventy-nine".