3981279 has 8 divisors (see below), whose sum is σ = 5587840. Its totient is φ = 2514456.

The previous prime is 3981253. The next prime is 3981301. The reversal of 3981279 is 9721893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3981279 - 2²⁰ = 2932703 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 (3981209) 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, 34867 + ... + 34980.

It is an arithmetic number, because the mean of its divisors is an integer number (698480).

Almost surely, 2^3981279 is an apocalyptic number.

3981279 is a deficient number, since it is larger than the sum of its proper divisors (1606561).

3981279 is a wasteful number, since it uses less digits than its factorization.

3981279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69869.

The product of its digits is 27216, while the sum is 39.

The square root of 3981279 is about 1995.3142609624. The cubic root of 3981279 is about 158.4920700455.

It can be divided in two parts, 39 and 81279, that added together give a palindrome (81318).

The spelling of 3981279 in words is "three million, nine hundred eighty-one thousand, two hundred seventy-nine".