8040440069 has 2 divisors, whose sum is σ = 8040440070. Its totient is φ = 8040440068.

The previous prime is 8040440033. The next prime is 8040440099. The reversal of 8040440069 is 9600440408.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5412544900 + 2627895169 = 73570^2 + 51263^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8040440069 is a prime.

It is a super-2 number, since 2×8040440069² (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 (8040440029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4020220034 + 4020220035.

It is an arithmetic number, because the mean of its divisors is an integer number (4020220035).

Almost surely, 2^8040440069 is an apocalyptic number.

It is an amenable number.

8040440069 is a deficient number, since it is larger than the sum of its proper divisors (1).

8040440069 is an equidigital number, since it uses as much as digits as its factorization.

8040440069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 8040440069 is about 89668.5009855746. The cubic root of 8040440069 is about 2003.3643431741.

The spelling of 8040440069 in words is "eight billion, forty million, four hundred forty thousand, sixty-nine".