891330343369 has 2 divisors, whose sum is σ = 891330343370. Its totient is φ = 891330343368.

The previous prime is 891330343331. The next prime is 891330343411. The reversal of 891330343369 is 963343033198.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 712665198025 + 178665145344 = 844195^2 + 422688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-891330343369 is a prime.

It is a super-2 number, since 2×891330343369² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (891330343769) 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, 445665171684 + 445665171685.

It is an arithmetic number, because the mean of its divisors is an integer number (445665171685).

Almost surely, 2^891330343369 is an apocalyptic number.

It is an amenable number.

891330343369 is a deficient number, since it is larger than the sum of its proper divisors (1).

891330343369 is an equidigital number, since it uses as much as digits as its factorization.

891330343369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3779136, while the sum is 52.

The spelling of 891330343369 in words is "eight hundred ninety-one billion, three hundred thirty million, three hundred forty-three thousand, three hundred sixty-nine".