4939981 has 8 divisors (see below), whose sum is σ = 5341280. Its totient is φ = 4552848.

The previous prime is 4939973. The next prime is 4939993. The reversal of 4939981 is 1899394.

4939981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 4939981 - 2³ = 4939973 is a prime.

It is a super-2 number, since 2×4939981² = 48806824560722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4939901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2811 + ... + 4216.

It is an arithmetic number, because the mean of its divisors is an integer number (667660).

Almost surely, 2^4939981 is an apocalyptic number.

4939981 is the 1406-th heptagonal number.

It is an amenable number.

4939981 is a deficient number, since it is larger than the sum of its proper divisors (401299).

4939981 is a wasteful number, since it uses less digits than its factorization.

4939981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7083.

The product of its digits is 69984, while the sum is 43.

The square root of 4939981 is about 2222.6068028331. The cubic root of 4939981 is about 170.3106315930.

The spelling of 4939981 in words is "four million, nine hundred thirty-nine thousand, nine hundred eighty-one".