998933231 has 2 divisors, whose sum is σ = 998933232. Its totient is φ = 998933230.

The previous prime is 998933203. The next prime is 998933239. The reversal of 998933231 is 132339899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998933231 - 2¹⁴ = 998916847 is a prime.

It is a super-2 number, since 2×998933231² = 1995735199992198722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998933239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499466615 + 499466616.

It is an arithmetic number, because the mean of its divisors is an integer number (499466616).

Almost surely, 2^998933231 is an apocalyptic number.

998933231 is a deficient number, since it is larger than the sum of its proper divisors (1).

998933231 is an equidigital number, since it uses as much as digits as its factorization.

998933231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 47.

The square root of 998933231 is about 31605.9050020720. The cubic root of 998933231 is about 999.6442838143.

The spelling of 998933231 in words is "nine hundred ninety-eight million, nine hundred thirty-three thousand, two hundred thirty-one".