39839493893 has 4 divisors (see below), whose sum is σ = 40811188908. Its totient is φ = 38867798880.

The previous prime is 39839493871. The next prime is 39839493913.

39839493893 is nontrivially palindromic in base 10.

39839493893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14142442084 + 25697051809 = 118922^2 + 160303^2 .

It is a cyclic number.

It is not a de Polignac number, because 39839493893 - 2³⁴ = 22659624709 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 (39839493193) 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, 485847446 + ... + 485847527.

It is an arithmetic number, because the mean of its divisors is an integer number (10202797227).

Almost surely, 2^39839493893 is an apocalyptic number.

It is an amenable number.

39839493893 is a deficient number, since it is larger than the sum of its proper divisors (971695015).

39839493893 is an equidigital number, since it uses as much as digits as its factorization.

39839493893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971695014.

The product of its digits is 136048896, while the sum is 68.

The spelling of 39839493893 in words is "thirty-nine billion, eight hundred thirty-nine million, four hundred ninety-three thousand, eight hundred ninety-three".