1317735049 has 4 divisors (see below), whose sum is σ = 1318937364. Its totient is φ = 1316532736.

The previous prime is 1317735047. The next prime is 1317735053. The reversal of 1317735049 is 9405377131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9405377131 = 19 ⋅495019849.

It can be written as a sum of positive squares in 2 ways, for example, as 1009205824 + 308529225 = 31768^2 + 17565^2 .

It is a 3-Lehmer number, since φ(1317735049) divides (1317735049-1)³.

It is a cyclic number.

It is not a de Polignac number, because 1317735049 - 2¹ = 1317735047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1317735047) by changing a digit.

It is a nontrivial repunit in base 1096.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599512 + ... + 601705.

It is an arithmetic number, because the mean of its divisors is an integer number (329734341).

Almost surely, 2^1317735049 is an apocalyptic number.

It is an amenable number.

1317735049 is a deficient number, since it is larger than the sum of its proper divisors (1202315).

1317735049 is a wasteful number, since it uses less digits than its factorization.

1317735049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202314.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 1317735049 is about 36300.6205043385. The cubic root of 1317735049 is about 1096.3335362346. Note that the first 3 decimals are identical.

The spelling of 1317735049 in words is "one billion, three hundred seventeen million, seven hundred thirty-five thousand, forty-nine".