1317782101 has 2 divisors, whose sum is σ = 1317782102. Its totient is φ = 1317782100.

The previous prime is 1317782093. The next prime is 1317782161. The reversal of 1317782101 is 1012877131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1068963025 + 248819076 = 32695^2 + 15774^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317782101 - 2³ = 1317782093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1317782161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658891050 + 658891051.

It is an arithmetic number, because the mean of its divisors is an integer number (658891051).

Almost surely, 2^1317782101 is an apocalyptic number.

It is an amenable number.

1317782101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317782101 is an equidigital number, since it uses as much as digits as its factorization.

1317782101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 31.

The square root of 1317782101 is about 36301.2685866486. The cubic root of 1317782101 is about 1096.3465849051.

The spelling of 1317782101 in words is "one billion, three hundred seventeen million, seven hundred eighty-two thousand, one hundred one".