3944891296427 has 4 divisors (see below), whose sum is σ = 3944896020360. Its totient is φ = 3944886572496.

The previous prime is 3944891296421. The next prime is 3944891296453. The reversal of 3944891296427 is 7246921984493.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3944891296427 - 2²⁴ = 3944874519211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3944891296421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 736433 + ... + 2903810.

It is an arithmetic number, because the mean of its divisors is an integer number (986224005090).

Almost surely, 2^{3944891296427} is an apocalyptic number.

3944891296427 is a deficient number, since it is larger than the sum of its proper divisors (4723933).

3944891296427 is a wasteful number, since it uses less digits than its factorization.

3944891296427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723932.

The product of its digits is 188116992, while the sum is 68.

The spelling of 3944891296427 in words is "three trillion, nine hundred forty-four billion, eight hundred ninety-one million, two hundred ninety-six thousand, four hundred twenty-seven".