4981981 has 2 divisors, whose sum is σ = 4981982. Its totient is φ = 4981980.

The previous prime is 4981967. The next prime is 4981993. The reversal of 4981981 is 1891894.

4981981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3118756 + 1863225 = 1766^2 + 1365^2 .

It is a cyclic number.

It is not a de Polignac number, because 4981981 - 2⁹ = 4981469 is a prime.

It is a super-2 number, since 2×4981981² = 49640269368722, which contains 22 as substring.

It is a Chen prime.

4981981 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4981481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2490990 + 2490991.

It is an arithmetic number, because the mean of its divisors is an integer number (2490991).

Almost surely, 2^4981981 is an apocalyptic number.

It is an amenable number.

4981981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4981981 is an equidigital number, since it uses as much as digits as its factorization.

4981981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 40.

The square root of 4981981 is about 2232.0351699738. The cubic root of 4981981 is about 170.7919337052.

The spelling of 4981981 in words is "four million, nine hundred eighty-one thousand, nine hundred eighty-one".