11021989 has 8 divisors (see below), whose sum is σ = 12317760. Its totient is φ = 9775200.

The previous prime is 11021981. The next prime is 11021993. The reversal of 11021989 is 98912011.

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 11021989 - 2³ = 11021981 is a prime.

It is a super-2 number, since 2×11021989² = 242968483032242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11021989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11769 + ... + 12670.

It is an arithmetic number, because the mean of its divisors is an integer number (1539720).

Almost surely, 2^11021989 is an apocalyptic number.

It is an amenable number.

11021989 is a deficient number, since it is larger than the sum of its proper divisors (1295771).

11021989 is a wasteful number, since it uses less digits than its factorization.

11021989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24491.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 11021989 is about 3319.9381018326. The cubic root of 11021989 is about 222.5461016284.

The spelling of 11021989 in words is "eleven million, twenty-one thousand, nine hundred eighty-nine".