3979124861 has 2 divisors, whose sum is σ = 3979124862. Its totient is φ = 3979124860.

The previous prime is 3979124843. The next prime is 3979124893. The reversal of 3979124861 is 1684219793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2865567961 + 1113556900 = 53531^2 + 33370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3979124861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3979124801) 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 as a sum of consecutive naturals, namely, 1989562430 + 1989562431.

It is an arithmetic number, because the mean of its divisors is an integer number (1989562431).

Almost surely, 2^3979124861 is an apocalyptic number.

It is an amenable number.

3979124861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3979124861 is an equidigital number, since it uses as much as digits as its factorization.

3979124861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 3979124861 is about 63080.3048581726. The cubic root of 3979124861 is about 1584.6347994132.

The spelling of 3979124861 in words is "three billion, nine hundred seventy-nine million, one hundred twenty-four thousand, eight hundred sixty-one".