10989823 has 4 divisors (see below), whose sum is σ = 11835208. Its totient is φ = 10144440.

The previous prime is 10989817. The next prime is 10989857. The reversal of 10989823 is 32898901.

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 10989823 - 2¹⁷ = 10858751 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 (10989893) 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, 422673 + ... + 422698.

It is an arithmetic number, because the mean of its divisors is an integer number (2958802).

Almost surely, 2^10989823 is an apocalyptic number.

10989823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

10989823 is a deficient number, since it is larger than the sum of its proper divisors (845385).

10989823 is an equidigital number, since it uses as much as digits as its factorization.

10989823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845384.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 10989823 is about 3315.0901948514. The cubic root of 10989823 is about 222.3294016964.

The spelling of 10989823 in words is "ten million, nine hundred eighty-nine thousand, eight hundred twenty-three".