4809981 has 8 divisors (see below), whose sum is σ = 6996384. Its totient is φ = 2915120.

The previous prime is 4809977. The next prime is 4810019. The reversal of 4809981 is 1899084.

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 4809981 - 2² = 4809977 is a prime.

It is a super-3 number, since 3×4809981³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4809901) 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, 72846 + ... + 72911.

It is an arithmetic number, because the mean of its divisors is an integer number (874548).

Almost surely, 2^4809981 is an apocalyptic number.

It is an amenable number.

4809981 is a deficient number, since it is larger than the sum of its proper divisors (2186403).

4809981 is a wasteful number, since it uses less digits than its factorization.

4809981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145771.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 4809981 is about 2193.1668883147. The cubic root of 4809981 is about 168.8033729663.

The spelling of 4809981 in words is "four million, eight hundred nine thousand, nine hundred eighty-one".