3981456689 has 8 divisors (see below), whose sum is σ = 4554808128. Its totient is φ = 3409248240.

The previous prime is 3981456683. The next prime is 3981456767. The reversal of 3981456689 is 9866541893.

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 3981456689 - 2⁴ = 3981456673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3981456683) 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, 278267 + ... + 292224.

It is an arithmetic number, because the mean of its divisors is an integer number (569351016).

Almost surely, 2^3981456689 is an apocalyptic number.

It is an amenable number.

3981456689 is a deficient number, since it is larger than the sum of its proper divisors (573351439).

3981456689 is an equidigital number, since it uses as much as digits as its factorization.

3981456689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571495.

The product of its digits is 11197440, while the sum is 59.

The square root of 3981456689 is about 63098.7851626321. The cubic root of 3981456689 is about 1584.9442790404.

The spelling of 3981456689 in words is "three billion, nine hundred eighty-one million, four hundred fifty-six thousand, six hundred eighty-nine".