1091790289613 has 2 divisors, whose sum is σ = 1091790289614. Its totient is φ = 1091790289612.

The previous prime is 1091790289607. The next prime is 1091790289643. The reversal of 1091790289613 is 3169820971901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 917482369609 + 174307920004 = 957853^2 + 417502^2 .

It is a cyclic number.

It is not a de Polignac number, because 1091790289613 - 2²⁶ = 1091723180749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1091790289643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545895144806 + 545895144807.

It is an arithmetic number, because the mean of its divisors is an integer number (545895144807).

Almost surely, 2^{1091790289613} is an apocalyptic number.

It is an amenable number.

1091790289613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091790289613 is an equidigital number, since it uses as much as digits as its factorization.

1091790289613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 56.

The spelling of 1091790289613 in words is "one trillion, ninety-one billion, seven hundred ninety million, two hundred eighty-nine thousand, six hundred thirteen".