3971618879 has 2 divisors, whose sum is σ = 3971618880. Its totient is φ = 3971618878.

The previous prime is 3971618857. The next prime is 3971618881. The reversal of 3971618879 is 9788161793.

3971618879 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3971618879 is a prime.

It is a Sophie Germain prime.

Together with 3971618881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3971618839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985809439 + 1985809440.

It is an arithmetic number, because the mean of its divisors is an integer number (1985809440).

Almost surely, 2^3971618879 is an apocalyptic number.

3971618879 is a deficient number, since it is larger than the sum of its proper divisors (1).

3971618879 is an equidigital number, since it uses as much as digits as its factorization.

3971618879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 59.

The square root of 3971618879 is about 63020.7813264799. The cubic root of 3971618879 is about 1583.6377856305.

The spelling of 3971618879 in words is "three billion, nine hundred seventy-one million, six hundred eighteen thousand, eight hundred seventy-nine".