11989210823 has 8 divisors (see below), whose sum is σ = 12031749600. Its totient is φ = 11946748320.

The previous prime is 11989210819. The next prime is 11989210837. The reversal of 11989210823 is 32801298911.

It is a happy number.

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 11989210823 - 2² = 11989210819 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 (11989210813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305561 + ... + 342557.

It is an arithmetic number, because the mean of its divisors is an integer number (1503968700).

Almost surely, 2^11989210823 is an apocalyptic number.

11989210823 is a deficient number, since it is larger than the sum of its proper divisors (42538777).

11989210823 is an equidigital number, since it uses as much as digits as its factorization.

11989210823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38137.

The product of its (nonzero) digits is 62208, while the sum is 44.

The spelling of 11989210823 in words is "eleven billion, nine hundred eighty-nine million, two hundred ten thousand, eight hundred twenty-three".