3981544879 has 8 divisors (see below), whose sum is σ = 4435673760. Its totient is φ = 3548538336.

The previous prime is 3981544871. The next prime is 3981544901. The reversal of 3981544879 is 9784451893.

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 3981544879 - 2³ = 3981544871 is a prime.

It is a super-2 number, since 2×3981544879² = 31705399246982249282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981544871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5280187 + ... + 5280940.

It is an arithmetic number, because the mean of its divisors is an integer number (554459220).

Almost surely, 2^3981544879 is an apocalyptic number.

3981544879 is a deficient number, since it is larger than the sum of its proper divisors (454128881).

3981544879 is a wasteful number, since it uses less digits than its factorization.

3981544879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10561169.

The product of its digits is 8709120, while the sum is 58.

The square root of 3981544879 is about 63099.4839836270. The cubic root of 3981544879 is about 1584.9559812234.

The spelling of 3981544879 in words is "three billion, nine hundred eighty-one million, five hundred forty-four thousand, eight hundred seventy-nine".