1129423263491 has 2 divisors, whose sum is σ = 1129423263492. Its totient is φ = 1129423263490.

The previous prime is 1129423263431. The next prime is 1129423263557. The reversal of 1129423263491 is 1943623249211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1129423263491 - 2¹⁸ = 1129423001347 is a prime.

It is a super-2 number, since 2×1129423263491² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1129423263421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564711631745 + 564711631746.

It is an arithmetic number, because the mean of its divisors is an integer number (564711631746).

Almost surely, 2^{1129423263491} is an apocalyptic number.

1129423263491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1129423263491 is an equidigital number, since it uses as much as digits as its factorization.

1129423263491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 47.

The spelling of 1129423263491 in words is "one trillion, one hundred twenty-nine billion, four hundred twenty-three million, two hundred sixty-three thousand, four hundred ninety-one".