1317320447 has 8 divisors (see below), whose sum is σ = 1395984240. Its totient is φ = 1240872640.

The previous prime is 1317320387. The next prime is 1317320461. The reversal of 1317320447 is 7440237131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1317320447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317320467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552773 + ... + 555150.

It is an arithmetic number, because the mean of its divisors is an integer number (174498030).

Almost surely, 2^1317320447 is an apocalyptic number.

1317320447 is a deficient number, since it is larger than the sum of its proper divisors (78663793).

1317320447 is a wasteful number, since it uses less digits than its factorization.

1317320447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107993.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 1317320447 is about 36294.9093813444. The cubic root of 1317320447 is about 1096.2185435288.

Adding to 1317320447 its reverse (7440237131), we get a palindrome (8757557578).

The spelling of 1317320447 in words is "one billion, three hundred seventeen million, three hundred twenty thousand, four hundred forty-seven".