891338069 has 2 divisors, whose sum is σ = 891338070. Its totient is φ = 891338068.

The previous prime is 891338057. The next prime is 891338083. The reversal of 891338069 is 960833198.

891338069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 849023044 + 42315025 = 29138^2 + 6505^2 .

It is a cyclic number.

It is not a de Polignac number, because 891338069 - 2⁴ = 891338053 is a prime.

It is a super-2 number, since 2×891338069² = 1588967106497297522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (891338869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445669034 + 445669035.

It is an arithmetic number, because the mean of its divisors is an integer number (445669035).

Almost surely, 2^891338069 is an apocalyptic number.

It is an amenable number.

891338069 is a deficient number, since it is larger than the sum of its proper divisors (1).

891338069 is an equidigital number, since it uses as much as digits as its factorization.

891338069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 891338069 is about 29855.2854449593. The cubic root of 891338069 is about 962.3819859579.

The spelling of 891338069 in words is "eight hundred ninety-one million, three hundred thirty-eight thousand, sixty-nine".