3969009889 has 4 divisors (see below), whose sum is σ = 4274318356. Its totient is φ = 3663701424.

The previous prime is 3969009871. The next prime is 3969009923. The reversal of 3969009889 is 9889009693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9889009693 = 61 ⋅162114913.

It can be written as a sum of positive squares in 2 ways, for example, as 2180142864 + 1788867025 = 46692^2 + 42295^2 .

It is a cyclic number.

It is not a de Polignac number, because 3969009889 - 2⁷ = 3969009761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3969009859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152654214 + ... + 152654239.

It is an arithmetic number, because the mean of its divisors is an integer number (1068579589).

Almost surely, 2^3969009889 is an apocalyptic number.

It is an amenable number.

3969009889 is a deficient number, since it is larger than the sum of its proper divisors (305308467).

3969009889 is a wasteful number, since it uses less digits than its factorization.

3969009889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305308466.

The product of its (nonzero) digits is 7558272, while the sum is 61.

The square root of 3969009889 is about 63000.0784840781. The cubic root of 3969009889 is about 1583.2909413236.

The spelling of 3969009889 in words is "three billion, nine hundred sixty-nine million, nine thousand, eight hundred eighty-nine".