3978975433379 has 2 divisors, whose sum is σ = 3978975433380. Its totient is φ = 3978975433378.

The previous prime is 3978975433357. The next prime is 3978975433523. The reversal of 3978975433379 is 9733345798793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3978975433379 - 2¹² = 3978975429283 is a prime.

It is not a weakly prime, because it can be changed into another prime (3978975433579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989487716689 + 1989487716690.

It is an arithmetic number, because the mean of its divisors is an integer number (1989487716690).

Almost surely, 2^{3978975433379} is an apocalyptic number.

3978975433379 is a deficient number, since it is larger than the sum of its proper divisors (1).

3978975433379 is an equidigital number, since it uses as much as digits as its factorization.

3978975433379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240609120, while the sum is 77.

The spelling of 3978975433379 in words is "three trillion, nine hundred seventy-eight billion, nine hundred seventy-five million, four hundred thirty-three thousand, three hundred seventy-nine".