3989230721279 has 8 divisors (see below), whose sum is σ = 4055120702688. Its totient is φ = 3923356635360.

The previous prime is 3989230721263. The next prime is 3989230721291. The reversal of 3989230721279 is 9721270329893.

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 3989230721279 - 2⁴ = 3989230721263 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 (3989230721209) 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, 3467267 + ... + 4472180.

It is an arithmetic number, because the mean of its divisors is an integer number (506890087836).

Almost surely, 2^{3989230721279} is an apocalyptic number.

3989230721279 is a deficient number, since it is larger than the sum of its proper divisors (65889981409).

3989230721279 is an equidigital number, since it uses as much as digits as its factorization.

3989230721279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7947745.

The product of its (nonzero) digits is 20575296, while the sum is 62.

The spelling of 3989230721279 in words is "three trillion, nine hundred eighty-nine billion, two hundred thirty million, seven hundred twenty-one thousand, two hundred seventy-nine".