8169091069 has 2 divisors, whose sum is σ = 8169091070. Its totient is φ = 8169091068.

The previous prime is 8169091057. The next prime is 8169091081. The reversal of 8169091069 is 9601909618.

8169091069 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (8169091057) and next prime (8169091081).

It can be written as a sum of positive squares in only one way, i.e., 8070327225 + 98763844 = 89835^2 + 9938^2 .

It is a cyclic number.

It is not a de Polignac number, because 8169091069 - 2¹⁹ = 8168566781 is a prime.

It is a super-2 number, since 2×8169091069² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8169091669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4084545534 + 4084545535.

It is an arithmetic number, because the mean of its divisors is an integer number (4084545535).

Almost surely, 2^8169091069 is an apocalyptic number.

It is an amenable number.

8169091069 is a deficient number, since it is larger than the sum of its proper divisors (1).

8169091069 is an equidigital number, since it uses as much as digits as its factorization.

8169091069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 8169091069 is about 90383.0242302170. The cubic root of 8169091069 is about 2013.9927949476.

The spelling of 8169091069 in words is "eight billion, one hundred sixty-nine million, ninety-one thousand, sixty-nine".