3971828973829 has 2 divisors, whose sum is σ = 3971828973830. Its totient is φ = 3971828973828.

The previous prime is 3971828973793. The next prime is 3971828973859. The reversal of 3971828973829 is 9283798281793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2963407317025 + 1008421656804 = 1721455^2 + 1004202^2 .

It is a cyclic number.

It is not a de Polignac number, because 3971828973829 - 2⁹ = 3971828973317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3971828973859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985914486914 + 1985914486915.

It is an arithmetic number, because the mean of its divisors is an integer number (1985914486915).

Almost surely, 2^{3971828973829} is an apocalyptic number.

It is an amenable number.

3971828973829 is a deficient number, since it is larger than the sum of its proper divisors (1).

3971828973829 is an equidigital number, since it uses as much as digits as its factorization.

3971828973829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 658409472, while the sum is 76.

The spelling of 3971828973829 in words is "three trillion, nine hundred seventy-one billion, eight hundred twenty-eight million, nine hundred seventy-three thousand, eight hundred twenty-nine".