998966653 has 2 divisors, whose sum is σ = 998966654. Its totient is φ = 998966652.

The previous prime is 998966651. The next prime is 998966707. The reversal of 998966653 is 356669899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 698914969 + 300051684 = 26437^2 + 17322^2 .

998966653 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 998966653 - 2¹ = 998966651 is a prime.

Together with 998966651, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 998966591 and 998966600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998966651) 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, 499483326 + 499483327.

It is an arithmetic number, because the mean of its divisors is an integer number (499483327).

Almost surely, 2^998966653 is an apocalyptic number.

It is an amenable number.

998966653 is a deficient number, since it is larger than the sum of its proper divisors (1).

998966653 is an equidigital number, since it uses as much as digits as its factorization.

998966653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18895680, while the sum is 61.

The square root of 998966653 is about 31606.4337279611. The cubic root of 998966653 is about 999.6554322867.

The spelling of 998966653 in words is "nine hundred ninety-eight million, nine hundred sixty-six thousand, six hundred fifty-three".