3944111999 has 4 divisors (see below), whose sum is σ = 3955478664. Its totient is φ = 3932745336.

The previous prime is 3944111939. The next prime is 3944112001. The reversal of 3944111999 is 9991114493.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9991114493 = 3623 ⋅2757691.

It is a cyclic number.

It is not a de Polignac number, because 3944111999 - 2²⁴ = 3927334783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3944111939) 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, 5682812 + ... + 5683505.

It is an arithmetic number, because the mean of its divisors is an integer number (988869666).

Almost surely, 2^3944111999 is an apocalyptic number.

3944111999 is a deficient number, since it is larger than the sum of its proper divisors (11366665).

3944111999 is a wasteful number, since it uses less digits than its factorization.

3944111999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11366664.

The product of its digits is 314928, while the sum is 50.

The square root of 3944111999 is about 62802.1655597958. The cubic root of 3944111999 is about 1579.9732942930.

The spelling of 3944111999 in words is "three billion, nine hundred forty-four million, one hundred eleven thousand, nine hundred ninety-nine".