11381689 has 8 divisors (see below), whose sum is σ = 12545568. Its totient is φ = 10239360.

The previous prime is 11381647. The next prime is 11381693. The reversal of 11381689 is 98618311.

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 11381689 - 2⁷ = 11381561 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (11381189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4267 + ... + 6400.

It is an arithmetic number, because the mean of its divisors is an integer number (1568196).

Almost surely, 2^11381689 is an apocalyptic number.

11381689 is the 2134-th heptagonal number.

It is an amenable number.

11381689 is a deficient number, since it is larger than the sum of its proper divisors (1163879).

11381689 is a wasteful number, since it uses less digits than its factorization.

11381689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10775.

The product of its digits is 10368, while the sum is 37.

The square root of 11381689 is about 3373.6758884042. The cubic root of 11381689 is about 224.9411467470.

The spelling of 11381689 in words is "eleven million, three hundred eighty-one thousand, six hundred eighty-nine".