3909279889 has 4 divisors (see below), whose sum is σ = 3909441460. Its totient is φ = 3909118320.

The previous prime is 3909279859. The next prime is 3909279901. The reversal of 3909279889 is 9889729093.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2498000400 + 1411279489 = 49980^2 + 37567^2 .

It is a cyclic number.

It is not a de Polignac number, because 3909279889 - 2⁹ = 3909279377 is a prime.

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 3909279889.

It is not an unprimeable number, because it can be changed into a prime (3909279859) 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, 36342 + ... + 95599.

It is an arithmetic number, because the mean of its divisors is an integer number (977360365).

Almost surely, 2^3909279889 is an apocalyptic number.

It is an amenable number.

3909279889 is a deficient number, since it is larger than the sum of its proper divisors (161571).

3909279889 is a wasteful number, since it uses less digits than its factorization.

3909279889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161570.

The product of its (nonzero) digits is 17635968, while the sum is 64.

The square root of 3909279889 is about 62524.2344135456. The cubic root of 3909279889 is about 1575.3083987002.

The spelling of 3909279889 in words is "three billion, nine hundred nine million, two hundred seventy-nine thousand, eight hundred eighty-nine".