3979656109 has 24 divisors (see below), whose sum is σ = 4863261600. Its totient is φ = 3224370240.

The previous prime is 3979656097. The next prime is 3979656113. The reversal of 3979656109 is 9016569793.

It is not a de Polignac number, because 3979656109 - 2¹¹ = 3979654061 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 3979656109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3979656139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17002 + ... + 90820.

It is an arithmetic number, because the mean of its divisors is an integer number (202635900).

Almost surely, 2^3979656109 is an apocalyptic number.

It is an amenable number.

3979656109 is a deficient number, since it is larger than the sum of its proper divisors (883605491).

3979656109 is a wasteful number, since it uses less digits than its factorization.

3979656109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73885 (or 73872 counting only the distinct ones).

The product of its (nonzero) digits is 2755620, while the sum is 55.

The square root of 3979656109 is about 63084.5156040688. The cubic root of 3979656109 is about 1584.7053171473.

The spelling of 3979656109 in words is "three billion, nine hundred seventy-nine million, six hundred fifty-six thousand, one hundred nine".