3891842131939 has 2 divisors, whose sum is σ = 3891842131940. Its totient is φ = 3891842131938.

The previous prime is 3891842131927. The next prime is 3891842131981. The reversal of 3891842131939 is 9391312481983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3891842131939 - 2³⁷ = 3754403178467 is a prime.

It is not a weakly prime, because it can be changed into another prime (3891842131039) 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, 1945921065969 + 1945921065970.

It is an arithmetic number, because the mean of its divisors is an integer number (1945921065970).

Almost surely, 2^{3891842131939} is an apocalyptic number.

3891842131939 is a deficient number, since it is larger than the sum of its proper divisors (1).

3891842131939 is an equidigital number, since it uses as much as digits as its factorization.

3891842131939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10077696, while the sum is 61.

The spelling of 3891842131939 in words is "three trillion, eight hundred ninety-one billion, eight hundred forty-two million, one hundred thirty-one thousand, nine hundred thirty-nine".