3959780779 has 16 divisors (see below), whose sum is σ = 4161671136. Its totient is φ = 3764102400.

The previous prime is 3959780761. The next prime is 3959780789. The reversal of 3959780779 is 9770879593.

It is a cyclic number.

It is not a de Polignac number, because 3959780779 - 2¹³ = 3959772587 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 3959780779.

It is not an unprimeable number, because it can be changed into a prime (3959780789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260209 + ... + 275005.

It is an arithmetic number, because the mean of its divisors is an integer number (260104446).

Almost surely, 2^3959780779 is an apocalyptic number.

3959780779 is a deficient number, since it is larger than the sum of its proper divisors (201890357).

3959780779 is a wasteful number, since it uses less digits than its factorization.

3959780779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15006.

The product of its (nonzero) digits is 30005640, while the sum is 64.

The square root of 3959780779 is about 62926.7890409164. The cubic root of 3959780779 is about 1582.0627838963.

The spelling of 3959780779 in words is "three billion, nine hundred fifty-nine million, seven hundred eighty thousand, seven hundred seventy-nine".