3893991819401 has 2 divisors, whose sum is σ = 3893991819402. Its totient is φ = 3893991819400.

The previous prime is 3893991819371. The next prime is 3893991819409. The reversal of 3893991819401 is 1049181993983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3225260401801 + 668731417600 = 1795901^2 + 817760^2 .

It is a cyclic number.

It is not a de Polignac number, because 3893991819401 - 2²⁶ = 3893924710537 is a prime.

It is not a weakly prime, because it can be changed into another prime (3893991819409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1946995909700 + 1946995909701.

It is an arithmetic number, because the mean of its divisors is an integer number (1946995909701).

Almost surely, 2^{3893991819401} is an apocalyptic number.

It is an amenable number.

3893991819401 is a deficient number, since it is larger than the sum of its proper divisors (1).

3893991819401 is an equidigital number, since it uses as much as digits as its factorization.

3893991819401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15116544, while the sum is 65.

The spelling of 3893991819401 in words is "three trillion, eight hundred ninety-three billion, nine hundred ninety-one million, eight hundred nineteen thousand, four hundred one".