3989549279 has 4 divisors (see below), whose sum is σ = 3990143376. Its totient is φ = 3988955184.

The previous prime is 3989549251. The next prime is 3989549323. The reversal of 3989549279 is 9729459893.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3989549279 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 (3989546279) 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, 286859 + ... + 300444.

It is an arithmetic number, because the mean of its divisors is an integer number (997535844).

Almost surely, 2^3989549279 is an apocalyptic number.

3989549279 is a deficient number, since it is larger than the sum of its proper divisors (594097).

3989549279 is an equidigital number, since it uses as much as digits as its factorization.

3989549279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594096.

The product of its digits is 44089920, while the sum is 65.

The square root of 3989549279 is about 63162.8789638344. The cubic root of 3989549279 is about 1586.0173891190.

The spelling of 3989549279 in words is "three billion, nine hundred eighty-nine million, five hundred forty-nine thousand, two hundred seventy-nine".