1311662129 has 2 divisors, whose sum is σ = 1311662130. Its totient is φ = 1311662128.

The previous prime is 1311662123. The next prime is 1311662159. The reversal of 1311662129 is 9212661131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 803835904 + 507826225 = 28352^2 + 22535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311662129 - 2¹⁶ = 1311596593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311662095 and 1311662104.

It is not a weakly prime, because it can be changed into another prime (1311662123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655831064 + 655831065.

It is an arithmetic number, because the mean of its divisors is an integer number (655831065).

Almost surely, 2^1311662129 is an apocalyptic number.

It is an amenable number.

1311662129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311662129 is an equidigital number, since it uses as much as digits as its factorization.

1311662129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 32.

The square root of 1311662129 is about 36216.8763009733. The cubic root of 1311662129 is about 1094.6467530231.

The spelling of 1311662129 in words is "one billion, three hundred eleven million, six hundred sixty-two thousand, one hundred twenty-nine".