1318371949 has 16 divisors (see below), whose sum is σ = 1369944576. Its totient is φ = 1267907200.

The previous prime is 1318371941. The next prime is 1318371953. The reversal of 1318371949 is 9491738131.

It is a cyclic number.

It is not a de Polignac number, because 1318371949 - 2³ = 1318371941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1318371899 and 1318371908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318371941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1537929 + ... + 1538785.

It is an arithmetic number, because the mean of its divisors is an integer number (85621536).

Almost surely, 2^1318371949 is an apocalyptic number.

It is an amenable number.

1318371949 is a deficient number, since it is larger than the sum of its proper divisors (51572627).

1318371949 is an equidigital number, since it uses as much as digits as its factorization.

1318371949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436.

The product of its digits is 163296, while the sum is 46.

The square root of 1318371949 is about 36309.3920218998. The cubic root of 1318371949 is about 1096.5101378370.

The spelling of 1318371949 in words is "one billion, three hundred eighteen million, three hundred seventy-one thousand, nine hundred forty-nine".