998147 has 2 divisors, whose sum is σ = 998148. Its totient is φ = 998146.

The previous prime is 998117. The next prime is 998161. The reversal of 998147 is 741899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998147 - 2⁶ = 998083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 998147.

It is not a weakly prime, because it can be changed into another prime (998117) 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, 499073 + 499074.

It is an arithmetic number, because the mean of its divisors is an integer number (499074).

2⁹⁹⁸¹⁴⁷ is an apocalyptic number.

998147 is a deficient number, since it is larger than the sum of its proper divisors (1).

998147 is an equidigital number, since it uses as much as digits as its factorization.

998147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 38.

The square root of 998147 is about 999.0730704008. The cubic root of 998147 is about 99.9381951428.

The spelling of 998147 in words is "nine hundred ninety-eight thousand, one hundred forty-seven".