3909965869 has 2 divisors, whose sum is σ = 3909965870. Its totient is φ = 3909965868.

The previous prime is 3909965821. The next prime is 3909965879. The reversal of 3909965869 is 9685699093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2971340100 + 938625769 = 54510^2 + 30637^2 .

It is a cyclic number.

It is not a de Polignac number, because 3909965869 - 2¹⁵ = 3909933101 is a prime.

It is a super-2 number, since 2×3909965869² = 30575666193489850322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3909965869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3909965819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1954982934 + 1954982935.

It is an arithmetic number, because the mean of its divisors is an integer number (1954982935).

Almost surely, 2^3909965869 is an apocalyptic number.

It is an amenable number.

3909965869 is a deficient number, since it is larger than the sum of its proper divisors (1).

3909965869 is an equidigital number, since it uses as much as digits as its factorization.

3909965869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28343520, while the sum is 64.

The square root of 3909965869 is about 62529.7198858271. The cubic root of 3909965869 is about 1575.4005356056.

The spelling of 3909965869 in words is "three billion, nine hundred nine million, nine hundred sixty-five thousand, eight hundred sixty-nine".