1318320961 has 8 divisors (see below), whose sum is σ = 1349680640. Its totient is φ = 1286993232.

The previous prime is 1318320937. The next prime is 1318320967. The reversal of 1318320961 is 1690238131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1318320961 - 2¹¹ = 1318318913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1318320967) 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 7 ways as a sum of consecutive naturals, for example, 89431 + ... + 103123.

It is an arithmetic number, because the mean of its divisors is an integer number (168710080).

Almost surely, 2^1318320961 is an apocalyptic number.

It is an amenable number.

1318320961 is a deficient number, since it is larger than the sum of its proper divisors (31359679).

1318320961 is a wasteful number, since it uses less digits than its factorization.

1318320961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15975.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1318320961 is about 36308.6898827264. The cubic root of 1318320961 is about 1096.4960018213.

The spelling of 1318320961 in words is "one billion, three hundred eighteen million, three hundred twenty thousand, nine hundred sixty-one".