4998989 has 2 divisors, whose sum is σ = 4998990. Its totient is φ = 4998988.

The previous prime is 4998979. The next prime is 4998997. The reversal of 4998989 is 9898994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2778889 + 2220100 = 1667^2 + 1490^2 .

It is a cyclic number.

It is not a de Polignac number, because 4998989 - 2⁸ = 4998733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4998979) 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, 2499494 + 2499495.

It is an arithmetic number, because the mean of its divisors is an integer number (2499495).

Almost surely, 2^4998989 is an apocalyptic number.

It is an amenable number.

4998989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4998989 is an equidigital number, since it uses as much as digits as its factorization.

4998989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 56.

The square root of 4998989 is about 2235.8418995984. The cubic root of 4998989 is about 170.9860686529.

The spelling of 4998989 in words is "four million, nine hundred ninety-eight thousand, nine hundred eighty-nine".