9909013823 has 4 divisors (see below), whose sum is σ = 9909826800. Its totient is φ = 9908200848.

The previous prime is 9909013813. The next prime is 9909013831. The reversal of 9909013823 is 3283109099.

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

It is a cyclic number.

It is not a de Polignac number, because 9909013823 - 2¹⁸ = 9908751679 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 (9909013813) 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, 387923 + ... + 412676.

It is an arithmetic number, because the mean of its divisors is an integer number (2477456700).

Almost surely, 2^9909013823 is an apocalyptic number.

9909013823 is a deficient number, since it is larger than the sum of its proper divisors (812977).

9909013823 is a wasteful number, since it uses less digits than its factorization.

9909013823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812976.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 9909013823 is about 99544.0295698341. The cubic root of 9909013823 is about 2147.8806462094.

The spelling of 9909013823 in words is "nine billion, nine hundred nine million, thirteen thousand, eight hundred twenty-three".