3979081689 has 32 divisors (see below), whose sum is σ = 5904814464. Its totient is φ = 2362913280.

The previous prime is 3979081681. The next prime is 3979081723. The reversal of 3979081689 is 9861809793.

It is not a de Polignac number, because 3979081689 - 2³ = 3979081681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3979081681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2400549 + ... + 2402205.

It is an arithmetic number, because the mean of its divisors is an integer number (184525452).

Almost surely, 2^3979081689 is an apocalyptic number.

It is an amenable number.

3979081689 is a deficient number, since it is larger than the sum of its proper divisors (1925732775).

3979081689 is a wasteful number, since it uses less digits than its factorization.

3979081689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3097.

The product of its (nonzero) digits is 5878656, while the sum is 60.

The square root of 3979081689 is about 63079.9626585178. The cubic root of 3979081689 is about 1584.6290684964.

The spelling of 3979081689 in words is "three billion, nine hundred seventy-nine million, eighty-one thousand, six hundred eighty-nine".