998604149 has 2 divisors, whose sum is σ = 998604150. Its totient is φ = 998604148.

The previous prime is 998604121. The next prime is 998604163. The reversal of 998604149 is 941406899.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 592581649 + 406022500 = 24343^2 + 20150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998604149 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 998604097 and 998604106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998604169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499302074 + 499302075.

It is an arithmetic number, because the mean of its divisors is an integer number (499302075).

Almost surely, 2^998604149 is an apocalyptic number.

It is an amenable number.

998604149 is a deficient number, since it is larger than the sum of its proper divisors (1).

998604149 is an equidigital number, since it uses as much as digits as its factorization.

998604149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 998604149 is about 31600.6985524055. The cubic root of 998604149 is about 999.5344996764.

The spelling of 998604149 in words is "nine hundred ninety-eight million, six hundred four thousand, one hundred forty-nine".