1317775157 has 2 divisors, whose sum is σ = 1317775158. Its totient is φ = 1317775156.

The previous prime is 1317775139. The next prime is 1317775159. The reversal of 1317775157 is 7515777131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 868716676 + 449058481 = 29474^2 + 21191^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317775157 - 2¹² = 1317771061 is a prime.

Together with 1317775159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1317775159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658887578 + 658887579.

It is an arithmetic number, because the mean of its divisors is an integer number (658887579).

Almost surely, 2^1317775157 is an apocalyptic number.

It is an amenable number.

1317775157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317775157 is an equidigital number, since it uses as much as digits as its factorization.

1317775157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180075, while the sum is 44.

The square root of 1317775157 is about 36301.1729424822. The cubic root of 1317775157 is about 1096.3446591836.

The spelling of 1317775157 in words is "one billion, three hundred seventeen million, seven hundred seventy-five thousand, one hundred fifty-seven".