1318137329 has 4 divisors (see below), whose sum is σ = 1360657920. Its totient is φ = 1275616740.

The previous prime is 1318137287. The next prime is 1318137361. The reversal of 1318137329 is 9237318131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9237318131 = 479 ⋅19284589.

It is a cyclic number.

It is not a de Polignac number, because 1318137329 - 2²⁴ = 1301360113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1318137292 and 1318137301.

It is not an unprimeable number, because it can be changed into a prime (1318137529) 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, 21260249 + ... + 21260310.

It is an arithmetic number, because the mean of its divisors is an integer number (340164480).

Almost surely, 2^1318137329 is an apocalyptic number.

It is an amenable number.

1318137329 is a deficient number, since it is larger than the sum of its proper divisors (42520591).

1318137329 is an equidigital number, since it uses as much as digits as its factorization.

1318137329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42520590.

The product of its digits is 27216, while the sum is 38.

The square root of 1318137329 is about 36306.1610336317. The cubic root of 1318137329 is about 1096.4450882959.

The spelling of 1318137329 in words is "one billion, three hundred eighteen million, one hundred thirty-seven thousand, three hundred twenty-nine".