11965223 has 4 divisors (see below), whose sum is σ = 12243528. Its totient is φ = 11686920.

The previous prime is 11965207. The next prime is 11965237. The reversal of 11965223 is 32256911.

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

It is a cyclic number.

It is not a de Polignac number, because 11965223 - 2⁴ = 11965207 is a prime.

It is a super-2 number, since 2×11965223² = 286333122879458, 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 (11965253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139088 + ... + 139173.

It is an arithmetic number, because the mean of its divisors is an integer number (3060882).

Almost surely, 2^11965223 is an apocalyptic number.

11965223 is a deficient number, since it is larger than the sum of its proper divisors (278305).

11965223 is an equidigital number, since it uses as much as digits as its factorization.

11965223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278304.

The product of its digits is 3240, while the sum is 29.

The square root of 11965223 is about 3459.0783454556. The cubic root of 11965223 is about 228.7214693631.

The spelling of 11965223 in words is "eleven million, nine hundred sixty-five thousand, two hundred twenty-three".