1317273705 has 64 divisors (see below), whose sum is σ = 2689228800. Its totient is φ = 605050560.

The previous prime is 1317273703. The next prime is 1317273719. The reversal of 1317273705 is 5073727131.

1317273705 is a `hidden beast` number, since 1 + 317 + 273 + 70 + 5 = 666.

It is not a de Polignac number, because 1317273705 - 2¹ = 1317273703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1317273705.

It is not an unprimeable number, because it can be changed into a prime (1317273703) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4872 + ... + 51558.

It is an arithmetic number, because the mean of its divisors is an integer number (42019200).

Almost surely, 2^1317273705 is an apocalyptic number.

1317273705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1317273705 is an abundant number, since it is smaller than the sum of its proper divisors (1371955095).

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

1317273705 is a wasteful number, since it uses less digits than its factorization.

1317273705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46731 (or 46725 counting only the distinct ones).

The product of its (nonzero) digits is 30870, while the sum is 36.

The square root of 1317273705 is about 36294.2654561296. The cubic root of 1317273705 is about 1096.2055778015.

The spelling of 1317273705 in words is "one billion, three hundred seventeen million, two hundred seventy-three thousand, seven hundred five".