998654281 has 2 divisors, whose sum is σ = 998654282. Its totient is φ = 998654280.

The previous prime is 998654233. The next prime is 998654329. The reversal of 998654281 is 182456899.

It is a balanced prime because it is at equal distance from previous prime (998654233) and next prime (998654329).

It can be written as a sum of positive squares in only one way, i.e., 785961225 + 212693056 = 28035^2 + 14584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998654281 is a prime.

It is a super-2 number, since 2×998654281² = 1994620745919253922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (998654221) 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, 499327140 + 499327141.

It is an arithmetic number, because the mean of its divisors is an integer number (499327141).

Almost surely, 2^998654281 is an apocalyptic number.

It is an amenable number.

998654281 is a deficient number, since it is larger than the sum of its proper divisors (1).

998654281 is an equidigital number, since it uses as much as digits as its factorization.

998654281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 52.

The square root of 998654281 is about 31601.4917527638. The cubic root of 998654281 is about 999.5512256317.

The spelling of 998654281 in words is "nine hundred ninety-eight million, six hundred fifty-four thousand, two hundred eighty-one".