998633 has 2 divisors, whose sum is σ = 998634. Its totient is φ = 998632.

The previous prime is 998629. The next prime is 998651. The reversal of 998633 is 336899.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 994009 + 4624 = 997^2 + 68^2 .

It is an emirp because it is prime and its reverse (336899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998633 - 2² = 998629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (998623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499316 + 499317.

It is an arithmetic number, because the mean of its divisors is an integer number (499317).

2⁹⁹⁸⁶³³ is an apocalyptic number.

It is an amenable number.

998633 is a deficient number, since it is larger than the sum of its proper divisors (1).

998633 is an equidigital number, since it uses as much as digits as its factorization.

998633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 38.

The square root of 998633 is about 999.3162662541. The cubic root of 998633 is about 99.9544125543.

The spelling of 998633 in words is "nine hundred ninety-eight thousand, six hundred thirty-three".