1311197918929 has 2 divisors, whose sum is σ = 1311197918930. Its totient is φ = 1311197918928.

The previous prime is 1311197918903. The next prime is 1311197918939. The reversal of 1311197918929 is 9298197911131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1309983257025 + 1214661904 = 1144545^2 + 34852^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311197918929 - 2⁹ = 1311197918417 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311197918939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655598959464 + 655598959465.

It is an arithmetic number, because the mean of its divisors is an integer number (655598959465).

Almost surely, 2^{1311197918929} is an apocalyptic number.

It is an amenable number.

1311197918929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311197918929 is an equidigital number, since it uses as much as digits as its factorization.

1311197918929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2204496, while the sum is 61.

The spelling of 1311197918929 in words is "one trillion, three hundred eleven billion, one hundred ninety-seven million, nine hundred eighteen thousand, nine hundred twenty-nine".