9913809 has 8 divisors (see below), whose sum is σ = 13468032. Its totient is φ = 6484400.

The previous prime is 9913807. The next prime is 9913811. The reversal of 9913809 is 9083199.

9913809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9913807) and next prime (9913811).

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 9913809 - 2¹ = 9913807 is a prime.

It is an Ulam number.

9913809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9913807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31017 + ... + 31334.

It is an arithmetic number, because the mean of its divisors is an integer number (1683504).

Almost surely, 2^9913809 is an apocalyptic number.

It is an amenable number.

9913809 is a deficient number, since it is larger than the sum of its proper divisors (3554223).

9913809 is a wasteful number, since it uses less digits than its factorization.

9913809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62407.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 9913809 is about 3148.6201739810. The cubic root of 9913809 is about 214.8227058312.

The spelling of 9913809 in words is "nine million, nine hundred thirteen thousand, eight hundred nine".