2891106173129 has 2 divisors, whose sum is σ = 2891106173130. Its totient is φ = 2891106173128.

The previous prime is 2891106173099. The next prime is 2891106173141. The reversal of 2891106173129 is 9213716011982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2564007967504 + 327098205625 = 1601252^2 + 571925^2 .

It is a cyclic number.

It is not a de Polignac number, because 2891106173129 - 2⁸ = 2891106172873 is a prime.

It is a super-2 number, since 2×2891106173129² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2891106173149) 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, 1445553086564 + 1445553086565.

It is an arithmetic number, because the mean of its divisors is an integer number (1445553086565).

Almost surely, 2^{2891106173129} is an apocalyptic number.

It is an amenable number.

2891106173129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2891106173129 is an equidigital number, since it uses as much as digits as its factorization.

2891106173129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 50.

The spelling of 2891106173129 in words is "two trillion, eight hundred ninety-one billion, one hundred six million, one hundred seventy-three thousand, one hundred twenty-nine".