11273539 has 4 divisors (see below), whose sum is σ = 11289456. Its totient is φ = 11257624.

The previous prime is 11273527. The next prime is 11273551. The reversal of 11273539 is 93537211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93537211 = 101 ⋅926111.

It is an interprime number because it is at equal distance from previous prime (11273527) and next prime (11273551).

It is a cyclic number.

It is not a de Polignac number, because 11273539 - 2⁹ = 11273027 is a prime.

It is a Smith number, since the sum of its digits (31) 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 self number, because there is not a number n which added to its sum of digits gives 11273539.

It is not an unprimeable number, because it can be changed into a prime (11273579) 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, 6844 + ... + 8329.

It is an arithmetic number, because the mean of its divisors is an integer number (2822364).

Almost surely, 2^11273539 is an apocalyptic number.

11273539 is a deficient number, since it is larger than the sum of its proper divisors (15917).

11273539 is an equidigital number, since it uses as much as digits as its factorization.

11273539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15916.

The product of its digits is 5670, while the sum is 31.

The square root of 11273539 is about 3357.6091195969. The cubic root of 11273539 is about 224.2264066598.

The spelling of 11273539 in words is "eleven million, two hundred seventy-three thousand, five hundred thirty-nine".