98399909 has 8 divisors (see below), whose sum is σ = 101315448. Its totient is φ = 95497920.

The previous prime is 98399897. The next prime is 98399923. The reversal of 98399909 is 90999389.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7579009 + 90820900 = 2753^2 + 9530^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 98399909 - 2²⁴ = 81622693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98392909) 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 7 ways as a sum of consecutive naturals, for example, 12419 + ... + 18735.

It is an arithmetic number, because the mean of its divisors is an integer number (12664431).

Almost surely, 2^98399909 is an apocalyptic number.

It is an amenable number.

98399909 is a deficient number, since it is larger than the sum of its proper divisors (2915539).

98399909 is a wasteful number, since it uses less digits than its factorization.

98399909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6775.

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

The square root of 98399909 is about 9919.6728272660. The cubic root of 98399909 is about 461.6699056337.

The spelling of 98399909 in words is "ninety-eight million, three hundred ninety-nine thousand, nine hundred nine".