1317379871 has 2 divisors, whose sum is σ = 1317379872. Its totient is φ = 1317379870.

The previous prime is 1317379849. The next prime is 1317379891. The reversal of 1317379871 is 1789737131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1317379871 - 2¹⁰ = 1317378847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1317379891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658689935 + 658689936.

It is an arithmetic number, because the mean of its divisors is an integer number (658689936).

Almost surely, 2^1317379871 is an apocalyptic number.

1317379871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317379871 is an equidigital number, since it uses as much as digits as its factorization.

1317379871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 47.

The square root of 1317379871 is about 36295.7279993114. The cubic root of 1317379871 is about 1096.2350266635.

The spelling of 1317379871 in words is "one billion, three hundred seventeen million, three hundred seventy-nine thousand, eight hundred seventy-one".