4989181 has 2 divisors, whose sum is σ = 4989182. Its totient is φ = 4989180.

The previous prime is 4989169. The next prime is 4989199. The reversal of 4989181 is 1819894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3363556 + 1625625 = 1834^2 + 1275^2 .

It is a cyclic number.

It is not a de Polignac number, because 4989181 - 2⁷ = 4989053 is a prime.

It is a super-2 number, since 2×4989181² = 49783854101522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4989121) 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 as a sum of consecutive naturals, namely, 2494590 + 2494591.

It is an arithmetic number, because the mean of its divisors is an integer number (2494591).

Almost surely, 2^4989181 is an apocalyptic number.

It is an amenable number.

4989181 is a deficient number, since it is larger than the sum of its proper divisors (1).

4989181 is an equidigital number, since it uses as much as digits as its factorization.

4989181 is an odious number, because the sum of its binary digits is odd.

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

The square root of 4989181 is about 2233.6474654699. The cubic root of 4989181 is about 170.8741707381.

The spelling of 4989181 in words is "four million, nine hundred eighty-nine thousand, one hundred eighty-one".