11390989 has 4 divisors (see below), whose sum is σ = 11668860. Its totient is φ = 11113120.

The previous prime is 11390971. The next prime is 11390999. The reversal of 11390989 is 98909311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6734025 + 4656964 = 2595^2 + 2158^2 .

It is a cyclic number.

It is not a de Polignac number, because 11390989 - 2¹¹ = 11388941 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11390909) 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 3 ways as a sum of consecutive naturals, for example, 138874 + ... + 138955.

It is an arithmetic number, because the mean of its divisors is an integer number (2917215).

Almost surely, 2^11390989 is an apocalyptic number.

It is an amenable number.

11390989 is a deficient number, since it is larger than the sum of its proper divisors (277871).

11390989 is an equidigital number, since it uses as much as digits as its factorization.

11390989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277870.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 11390989 is about 3375.0539254951. The cubic root of 11390989 is about 225.0023966823.

The spelling of 11390989 in words is "eleven million, three hundred ninety thousand, nine hundred eighty-nine".