3978194616031 has 2 divisors, whose sum is σ = 3978194616032. Its totient is φ = 3978194616030.

The previous prime is 3978194615971. The next prime is 3978194616089. The reversal of 3978194616031 is 1306164918793.

It is an a-pointer prime, because the next prime (3978194616089) can be obtained adding 3978194616031 to its sum of digits (58).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3978194616031 - 2²³ = 3978186227423 is a prime.

It is a super-2 number, since 2×3978194616031² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3978194610031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989097308015 + 1989097308016.

It is an arithmetic number, because the mean of its divisors is an integer number (1989097308016).

Almost surely, 2^{3978194616031} is an apocalyptic number.

3978194616031 is a deficient number, since it is larger than the sum of its proper divisors (1).

3978194616031 is an equidigital number, since it uses as much as digits as its factorization.

3978194616031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The spelling of 3978194616031 in words is "three trillion, nine hundred seventy-eight billion, one hundred ninety-four million, six hundred sixteen thousand, thirty-one".