99650809 has 4 divisors (see below), whose sum is σ = 100003216. Its totient is φ = 99298404.

The previous prime is 99650807. The next prime is 99650867. The reversal of 99650809 is 90805699.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90805699 = 29 ⋅3131231.

It is a cyclic number.

It is not a de Polignac number, because 99650809 - 2¹ = 99650807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99650807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175779 + ... + 176344.

It is an arithmetic number, because the mean of its divisors is an integer number (25000804).

Almost surely, 2^99650809 is an apocalyptic number.

It is an amenable number.

99650809 is a deficient number, since it is larger than the sum of its proper divisors (352407).

99650809 is a wasteful number, since it uses less digits than its factorization.

99650809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352406.

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 99650809 is about 9982.5251815360. The cubic root of 99650809 is about 463.6179862684.

The spelling of 99650809 in words is "ninety-nine million, six hundred fifty thousand, eight hundred nine".