3992873407891 has 2 divisors, whose sum is σ = 3992873407892. Its totient is φ = 3992873407890.

The previous prime is 3992873407837. The next prime is 3992873407903. The reversal of 3992873407891 is 1987043782993.

3992873407891 is digitally balanced in base 2, 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 not a de Polignac number, because 3992873407891 - 2⁹ = 3992873407379 is a prime.

It is a super-2 number, since 2×3992873407891² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3992873407891.

It is not a weakly prime, because it can be changed into another prime (3992873477891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996436703945 + 1996436703946.

It is an arithmetic number, because the mean of its divisors is an integer number (1996436703946).

Almost surely, 2^{3992873407891} is an apocalyptic number.

3992873407891 is a deficient number, since it is larger than the sum of its proper divisors (1).

3992873407891 is an equidigital number, since it uses as much as digits as its factorization.

3992873407891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 164602368, while the sum is 70.

The spelling of 3992873407891 in words is "three trillion, nine hundred ninety-two billion, eight hundred seventy-three million, four hundred seven thousand, eight hundred ninety-one".