3944691399 has 8 divisors (see below), whose sum is σ = 5737732992. Its totient is φ = 2390722040.

The previous prime is 3944691391. The next prime is 3944691409. The reversal of 3944691399 is 9931964493.

3944691399 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3944691399 - 2³ = 3944691391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3944691391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59768019 + ... + 59768084.

It is an arithmetic number, because the mean of its divisors is an integer number (717216624).

Almost surely, 2^3944691399 is an apocalyptic number.

3944691399 is a deficient number, since it is larger than the sum of its proper divisors (1793041593).

3944691399 is a wasteful number, since it uses less digits than its factorization.

3944691399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119536117.

The product of its digits is 5668704, while the sum is 57.

The square root of 3944691399 is about 62806.7782886529. The cubic root of 3944691399 is about 1580.0506578588.

The spelling of 3944691399 in words is "three billion, nine hundred forty-four million, six hundred ninety-one thousand, three hundred ninety-nine".