11273639 has 4 divisors (see below), whose sum is σ = 12140856. Its totient is φ = 10406424.

The previous prime is 11273629. The next prime is 11273653. The reversal of 11273639 is 93637211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93637211 = 139 ⋅673649.

It is a cyclic number.

It is not a de Polignac number, because 11273639 - 2¹² = 11269543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11273629) 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, 433589 + ... + 433614.

It is an arithmetic number, because the mean of its divisors is an integer number (3035214).

Almost surely, 2^11273639 is an apocalyptic number.

11273639 is a deficient number, since it is larger than the sum of its proper divisors (867217).

11273639 is an equidigital number, since it uses as much as digits as its factorization.

11273639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867216.

The product of its digits is 6804, while the sum is 32.

The square root of 11273639 is about 3357.6240111126. The cubic root of 11273639 is about 224.2270696452.

The spelling of 11273639 in words is "eleven million, two hundred seventy-three thousand, six hundred thirty-nine".