3981679 has 8 divisors (see below), whose sum is σ = 4343360. Its totient is φ = 3627936.

The previous prime is 3981647. The next prime is 3981683. The reversal of 3981679 is 9761893.

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

It is not a de Polignac number, because 3981679 - 2⁵ = 3981647 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 912 + ... + 2965.

It is an arithmetic number, because the mean of its divisors is an integer number (542920).

Almost surely, 2^3981679 is an apocalyptic number.

3981679 is a deficient number, since it is larger than the sum of its proper divisors (361681).

3981679 is a wasteful number, since it uses less digits than its factorization.

3981679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3969.

The product of its digits is 81648, while the sum is 43.

The square root of 3981679 is about 1995.4144932820. The cubic root of 3981679 is about 158.4973777791.

It can be divided in two parts, 39 and 81679, that added together give a palindrome (81718).

The spelling of 3981679 in words is "three million, nine hundred eighty-one thousand, six hundred seventy-nine".