998546869 has 2 divisors, whose sum is σ = 998546870. Its totient is φ = 998546868.

The previous prime is 998546851. The next prime is 998546917. The reversal of 998546869 is 968645899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 996159844 + 2387025 = 31562^2 + 1545^2 .

It is a cyclic number.

It is not a de Polignac number, because 998546869 - 2⁵ = 998546837 is a prime.

It is a super-2 number, since 2×998546869² = 1994191699179406322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 998546869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998546069) 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, 499273434 + 499273435.

It is an arithmetic number, because the mean of its divisors is an integer number (499273435).

Almost surely, 2^998546869 is an apocalyptic number.

It is an amenable number.

998546869 is a deficient number, since it is larger than the sum of its proper divisors (1).

998546869 is an equidigital number, since it uses as much as digits as its factorization.

998546869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33592320, while the sum is 64.

The square root of 998546869 is about 31599.7922303296. The cubic root of 998546869 is about 999.5153881893.

The spelling of 998546869 in words is "nine hundred ninety-eight million, five hundred forty-six thousand, eight hundred sixty-nine".