4989581 has 2 divisors, whose sum is σ = 4989582. Its totient is φ = 4989580.

The previous prime is 4989541. The next prime is 4989599. The reversal of 4989581 is 1859894.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3276100 + 1713481 = 1810^2 + 1309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4989581 is a prime.

It is a super-2 number, since 2×4989581² = 49791837111122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4989511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2494790 + 2494791.

It is an arithmetic number, because the mean of its divisors is an integer number (2494791).

Almost surely, 2^4989581 is an apocalyptic number.

It is an amenable number.

4989581 is a deficient number, since it is larger than the sum of its proper divisors (1).

4989581 is an equidigital number, since it uses as much as digits as its factorization.

4989581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 44.

The square root of 4989581 is about 2233.7370033198. The cubic root of 4989581 is about 170.8787371417.

The spelling of 4989581 in words is "four million, nine hundred eighty-nine thousand, five hundred eighty-one".