11722989 has 16 divisors (see below), whose sum is σ = 16312320. Its totient is φ = 7479360.

The previous prime is 11722973. The next prime is 11723009. The reversal of 11722989 is 98922711.

11722989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11722989 - 2⁴ = 11722973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11722189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10519 + ... + 11579.

It is an arithmetic number, because the mean of its divisors is an integer number (1019520).

Almost surely, 2^11722989 is an apocalyptic number.

It is an amenable number.

11722989 is a deficient number, since it is larger than the sum of its proper divisors (4589331).

11722989 is a wasteful number, since it uses less digits than its factorization.

11722989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220.

The product of its digits is 18144, while the sum is 39.

The square root of 11722989 is about 3423.8850740058. The cubic root of 11722989 is about 227.1674584440.

The spelling of 11722989 in words is "eleven million, seven hundred twenty-two thousand, nine hundred eighty-nine".