3999991878683 has 2 divisors, whose sum is σ = 3999991878684. Its totient is φ = 3999991878682.

The previous prime is 3999991878679. The next prime is 3999991878703. The reversal of 3999991878683 is 3868781999993.

3999991878683 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3999991878683 - 2² = 3999991878679 is a prime.

It is not a weakly prime, because it can be changed into another prime (3999991878613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999995939341 + 1999995939342.

It is an arithmetic number, because the mean of its divisors is an integer number (1999995939342).

Almost surely, 2^{3999991878683} is an apocalyptic number.

3999991878683 is a deficient number, since it is larger than the sum of its proper divisors (1).

3999991878683 is an equidigital number, since it uses as much as digits as its factorization.

3999991878683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11428107264, while the sum is 89.

The spelling of 3999991878683 in words is "three trillion, nine hundred ninety-nine billion, nine hundred ninety-one million, eight hundred seventy-eight thousand, six hundred eighty-three".