9993809 has 4 divisors (see below), whose sum is σ = 11421504. Its totient is φ = 8566116.

The previous prime is 9993803. The next prime is 9993821. The reversal of 9993809 is 9083999.

It is a happy number.

9993809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 9083999 = 311 ⋅29209.

It is a cyclic number.

It is not a de Polignac number, because 9993809 - 2⁴ = 9993793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9993803) 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, 713837 + ... + 713850.

It is an arithmetic number, because the mean of its divisors is an integer number (2855376).

Almost surely, 2^9993809 is an apocalyptic number.

It is an amenable number.

9993809 is a deficient number, since it is larger than the sum of its proper divisors (1427695).

9993809 is a wasteful number, since it uses less digits than its factorization.

9993809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427694.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 9993809 is about 3161.2986255651. The cubic root of 9993809 is about 215.3989994743.

The spelling of 9993809 in words is "nine million, nine hundred ninety-three thousand, eight hundred nine".