1317971144 has 16 divisors (see below), whose sum is σ = 2824224000. Its totient is φ = 564844752.

The previous prime is 1317971101. The next prime is 1317971147. The reversal of 1317971144 is 4411797131.

It is a junction number, because it is equal to n+sod(n) for n = 1317971098 and 1317971107.

It is not an unprimeable number, because it can be changed into a prime (1317971147) 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, 11767544 + ... + 11767655.

It is an arithmetic number, because the mean of its divisors is an integer number (176514000).

Almost surely, 2^1317971144 is an apocalyptic number.

1317971144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1317971144 is an abundant number, since it is smaller than the sum of its proper divisors (1506252856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1317971144 is a wasteful number, since it uses less digits than its factorization.

1317971144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23535212 (or 23535208 counting only the distinct ones).

The product of its digits is 21168, while the sum is 38.

The square root of 1317971144 is about 36303.8723003483. The cubic root of 1317971144 is about 1096.3990080226.

The spelling of 1317971144 in words is "one billion, three hundred seventeen million, nine hundred seventy-one thousand, one hundred forty-four".