3989347664349 has 4 divisors (see below), whose sum is σ = 5319130219136. Its totient is φ = 2659565109564.

The previous prime is 3989347664347. The next prime is 3989347664371. The reversal of 3989347664349 is 9434667439893.

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 not a de Polignac number, because 3989347664349 - 2¹ = 3989347664347 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 (3989347664347) 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, 664891277389 + ... + 664891277394.

It is an arithmetic number, because the mean of its divisors is an integer number (1329782554784).

Almost surely, 2^{3989347664349} is an apocalyptic number.

It is an amenable number.

3989347664349 is a deficient number, since it is larger than the sum of its proper divisors (1329782554787).

3989347664349 is a wasteful number, since it uses less digits than its factorization.

3989347664349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329782554786.

The product of its digits is 2539579392, while the sum is 75.

The spelling of 3989347664349 in words is "three trillion, nine hundred eighty-nine billion, three hundred forty-seven million, six hundred sixty-four thousand, three hundred forty-nine".