1089911 has 4 divisors (see below), whose sum is σ = 1092000. Its totient is φ = 1087824.

The previous prime is 1089877. The next prime is 1089917. The reversal of 1089911 is 1199801.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1089911 - 2¹⁸ = 827767 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089917) 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, 515 + ... + 1563.

It is an arithmetic number, because the mean of its divisors is an integer number (273000).

2^1089911 is an apocalyptic number.

1089911 is a deficient number, since it is larger than the sum of its proper divisors (2089).

1089911 is a wasteful number, since it uses less digits than its factorization.

1089911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 1089911 is about 1043.9880267513. The cubic root of 1089911 is about 102.9114455510.

The spelling of 1089911 in words is "one million, eighty-nine thousand, nine hundred eleven".