2640002069 has 2 divisors, whose sum is σ = 2640002070. Its totient is φ = 2640002068.

The previous prime is 2640002041. The next prime is 2640002081. The reversal of 2640002069 is 9602000462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2583180625 + 56821444 = 50825^2 + 7538^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640002069 - 2¹² = 2639997973 is a prime.

It is a super-2 number, since 2×2640002069² = 13939221848648561522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2640002089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320001034 + 1320001035.

It is an arithmetic number, because the mean of its divisors is an integer number (1320001035).

Almost surely, 2^2640002069 is an apocalyptic number.

It is an amenable number.

2640002069 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640002069 is an equidigital number, since it uses as much as digits as its factorization.

2640002069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 2640002069 is about 51380.9504485855. The cubic root of 2640002069 is about 1382.0850070543.

The spelling of 2640002069 in words is "two billion, six hundred forty million, two thousand, sixty-nine".