9998600049 has 9 divisors (see below), whose sum is σ = 14442855609. Its totient is φ = 6665533380.

The previous prime is 9998600041. The next prime is 9998600057. The reversal of 9998600049 is 9400068999.

It is a happy number.

The square root of 9998600049 is 99993.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (9998600041) and next prime (9998600057).

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 9998600049 - 2³ = 9998600041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9998599968 and 9998600004.

It is not an unprimeable number, because it can be changed into a prime (9998600041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 283314 + ... + 316644.

Almost surely, 2^9998600049 is an apocalyptic number.

9998600049 is the 99993-rd square number.

9998600049 is the 49997-th centered octagonal number.

It is an amenable number.

9998600049 is a deficient number, since it is larger than the sum of its proper divisors (4444255560).

9998600049 is an frugal number, since it uses more digits than its factorization.

9998600049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66668 (or 33334 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The cubic root of 9998600049 is about 2154.3341485733.

The spelling of 9998600049 in words is "nine billion, nine hundred ninety-eight million, six hundred thousand, forty-nine".