998839949 has 2 divisors, whose sum is σ = 998839950. Its totient is φ = 998839948.

The previous prime is 998839939. The next prime is 998839951. The reversal of 998839949 is 949938899.

998839949 is digitally balanced in base 2, 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., 956355625 + 42484324 = 30925^2 + 6518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998839949 is a prime.

Together with 998839951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998839939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499419974 + 499419975.

It is an arithmetic number, because the mean of its divisors is an integer number (499419975).

Almost surely, 2^998839949 is an apocalyptic number.

It is an amenable number.

998839949 is a deficient number, since it is larger than the sum of its proper divisors (1).

998839949 is an equidigital number, since it uses as much as digits as its factorization.

998839949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45349632, while the sum is 68.

The square root of 998839949 is about 31604.4292623676. The cubic root of 998839949 is about 999.6131667126.

The spelling of 998839949 in words is "nine hundred ninety-eight million, eight hundred thirty-nine thousand, nine hundred forty-nine".