1316772881 has 2 divisors, whose sum is σ = 1316772882. Its totient is φ = 1316772880.

The previous prime is 1316772829. The next prime is 1316772913. The reversal of 1316772881 is 1882776131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1314787600 + 1985281 = 36260^2 + 1409^2 .

It is a cyclic number.

It is not a de Polignac number, because 1316772881 - 2⁶ = 1316772817 is a prime.

It is a super-2 number, since 2×1316772881² = 3467781640274080322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1316772481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658386440 + 658386441.

It is an arithmetic number, because the mean of its divisors is an integer number (658386441).

Almost surely, 2^1316772881 is an apocalyptic number.

It is an amenable number.

1316772881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316772881 is an equidigital number, since it uses as much as digits as its factorization.

1316772881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 44.

The square root of 1316772881 is about 36287.3653080518. The cubic root of 1316772881 is about 1096.0666353651.

The spelling of 1316772881 in words is "one billion, three hundred sixteen million, seven hundred seventy-two thousand, eight hundred eighty-one".