3939889393 has 4 divisors (see below), whose sum is σ = 4298061168. Its totient is φ = 3581717620.

The previous prime is 3939889391. The next prime is 3939889423.

3939889393 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3939889393 - 2¹ = 3939889391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3939889391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179085871 + ... + 179085892.

It is an arithmetic number, because the mean of its divisors is an integer number (1074515292).

Almost surely, 2^3939889393 is an apocalyptic number.

It is an amenable number.

3939889393 is a deficient number, since it is larger than the sum of its proper divisors (358171775).

3939889393 is a wasteful number, since it uses less digits than its factorization.

3939889393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358171774.

The product of its digits is 34012224, while the sum is 64.

The square root of 3939889393 is about 62768.5382417019. The cubic root of 3939889393 is about 1579.4092478506.

The spelling of 3939889393 in words is "three billion, nine hundred thirty-nine million, eight hundred eighty-nine thousand, three hundred ninety-three".