3900040069 has 4 divisors (see below), whose sum is σ = 3900604140. Its totient is φ = 3899476000.

The previous prime is 3900040049. The next prime is 3900040097. The reversal of 3900040069 is 9600400093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9600400093 = 83 ⋅115667471.

It can be written as a sum of positive squares in 2 ways, for example, as 657307044 + 3242733025 = 25638^2 + 56945^2 .

It is a cyclic number.

It is not a de Polignac number, because 3900040069 - 2⁵ = 3900040037 is a prime.

It is a super-2 number, since 2×3900040069² = 30420625079611049522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3900040069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3900040049) 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 in 3 ways as a sum of consecutive naturals, for example, 271534 + ... + 285535.

It is an arithmetic number, because the mean of its divisors is an integer number (975151035).

Almost surely, 2^3900040069 is an apocalyptic number.

It is an amenable number.

3900040069 is a deficient number, since it is larger than the sum of its proper divisors (564071).

3900040069 is an equidigital number, since it uses as much as digits as its factorization.

3900040069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564070.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 3900040069 is about 62450.3007919097. The cubic root of 3900040069 is about 1574.0663073007.

The spelling of 3900040069 in words is "three billion, nine hundred million, forty thousand, sixty-nine".