99998309 has 4 divisors (see below), whose sum is σ = 102701004. Its totient is φ = 97295616.

The previous prime is 99998299. The next prime is 99998323. The reversal of 99998309 is 90389999.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73444900 + 26553409 = 8570^2 + 5153^2 .

It is a cyclic number.

It is not a de Polignac number, because 99998309 - 2¹⁶ = 99932773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99998609) 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 in 3 ways as a sum of consecutive naturals, for example, 1351292 + ... + 1351365.

It is an arithmetic number, because the mean of its divisors is an integer number (25675251).

Almost surely, 2^99998309 is an apocalyptic number.

It is an amenable number.

99998309 is a deficient number, since it is larger than the sum of its proper divisors (2702695).

99998309 is a wasteful number, since it uses less digits than its factorization.

99998309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702694.

The product of its (nonzero) digits is 1417176, while the sum is 56.

The square root of 99998309 is about 9999.9154496426. The cubic root of 99998309 is about 464.1562670376.

The spelling of 99998309 in words is "ninety-nine million, nine hundred ninety-eight thousand, three hundred nine".