4981993 has 2 divisors, whose sum is σ = 4981994. Its totient is φ = 4981992.

The previous prime is 4981981. The next prime is 4982011. The reversal of 4981993 is 3991894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4981824 + 169 = 2232^2 + 13^2 .

It is a cyclic number.

It is not a de Polignac number, because 4981993 - 2⁹ = 4981481 is a prime.

4981993 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4981903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2490996 + 2490997.

It is an arithmetic number, because the mean of its divisors is an integer number (2490997).

Almost surely, 2^4981993 is an apocalyptic number.

It is an amenable number.

4981993 is a deficient number, since it is larger than the sum of its proper divisors (1).

4981993 is an equidigital number, since it uses as much as digits as its factorization.

4981993 is an odious number, because the sum of its binary digits is odd.

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

The square root of 4981993 is about 2232.0378581019. The cubic root of 4981993 is about 170.7920708329.

Subtracting from 4981993 its reverse (3991894), we obtain a palindrome (990099).

The spelling of 4981993 in words is "four million, nine hundred eighty-one thousand, nine hundred ninety-three".