1317653209 has 2 divisors, whose sum is σ = 1317653210. Its totient is φ = 1317653208.

The previous prime is 1317653177. The next prime is 1317653243. The reversal of 1317653209 is 9023567131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1206033984 + 111619225 = 34728^2 + 10565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317653209 - 2⁵ = 1317653177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1317653269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658826604 + 658826605.

It is an arithmetic number, because the mean of its divisors is an integer number (658826605).

Almost surely, 2^1317653209 is an apocalyptic number.

It is an amenable number.

1317653209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317653209 is an equidigital number, since it uses as much as digits as its factorization.

1317653209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 1317653209 is about 36299.4932333772. The cubic root of 1317653209 is about 1096.3108392607.

The spelling of 1317653209 in words is "one billion, three hundred seventeen million, six hundred fifty-three thousand, two hundred nine".