11279869 has 4 divisors (see below), whose sum is σ = 11668860. Its totient is φ = 10890880.

The previous prime is 11279843. The next prime is 11279903. The reversal of 11279869 is 96897211.

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 4452100 + 6827769 = 2110^2 + 2613^2 .

It is a cyclic number.

It is not a de Polignac number, because 11279869 - 2⁵ = 11279837 is a prime.

It is a super-2 number, since 2×11279869² = 254470889314322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11279809) 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, 194452 + ... + 194509.

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

Almost surely, 2^11279869 is an apocalyptic number.

It is an amenable number.

11279869 is a deficient number, since it is larger than the sum of its proper divisors (388991).

11279869 is an equidigital number, since it uses as much as digits as its factorization.

11279869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388990.

The product of its digits is 54432, while the sum is 43.

The square root of 11279869 is about 3358.5516223515. The cubic root of 11279869 is about 224.2683659057.

The spelling of 11279869 in words is "eleven million, two hundred seventy-nine thousand, eight hundred sixty-nine".