1318273961 has 8 divisors (see below), whose sum is σ = 1326650400. Its totient is φ = 1309909120.

The previous prime is 1318273939. The next prime is 1318273973. The reversal of 1318273961 is 1693728131.

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 1318273961 - 2¹⁰ = 1318272937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1318273921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370730 + ... + 374268.

It is an arithmetic number, because the mean of its divisors is an integer number (165831300).

Almost surely, 2^1318273961 is an apocalyptic number.

It is an amenable number.

1318273961 is a deficient number, since it is larger than the sum of its proper divisors (8376439).

1318273961 is a wasteful number, since it uses less digits than its factorization.

1318273961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5799.

The product of its digits is 54432, while the sum is 41.

The square root of 1318273961 is about 36308.0426489779. The cubic root of 1318273961 is about 1096.4829711239.

The spelling of 1318273961 in words is "one billion, three hundred eighteen million, two hundred seventy-three thousand, nine hundred sixty-one".