998649269 has 2 divisors, whose sum is σ = 998649270. Its totient is φ = 998649268.

The previous prime is 998649263. The next prime is 998649371. The reversal of 998649269 is 962946899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 987844900 + 10804369 = 31430^2 + 3287^2 .

It is an emirp because it is prime and its reverse (962946899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998649269 - 2²⁰ = 997600693 is a prime.

It is a super-2 number, since 2×998649269² = 1994600724948468722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998649263) 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, 499324634 + 499324635.

It is an arithmetic number, because the mean of its divisors is an integer number (499324635).

Almost surely, 2^998649269 is an apocalyptic number.

It is an amenable number.

998649269 is a deficient number, since it is larger than the sum of its proper divisors (1).

998649269 is an equidigital number, since it uses as much as digits as its factorization.

998649269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15116544, while the sum is 62.

The square root of 998649269 is about 31601.4124526104. The cubic root of 998649269 is about 999.5495534617.

The spelling of 998649269 in words is "nine hundred ninety-eight million, six hundred forty-nine thousand, two hundred sixty-nine".