11817423 has 12 divisors (see below), whose sum is σ = 17812080. Its totient is φ = 7535616.

The previous prime is 11817391. The next prime is 11817433. The reversal of 11817423 is 32471811.

It is not a de Polignac number, because 11817423 - 2⁵ = 11817391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11817433) 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 11 ways as a sum of consecutive naturals, for example, 28338 + ... + 28751.

It is an arithmetic number, because the mean of its divisors is an integer number (1484340).

Almost surely, 2^11817423 is an apocalyptic number.

11817423 is a deficient number, since it is larger than the sum of its proper divisors (5994657).

11817423 is a wasteful number, since it uses less digits than its factorization.

11817423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57118 (or 57115 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 11817423 is about 3437.6478877279. The cubic root of 11817423 is about 227.7758068616.

The spelling of 11817423 in words is "eleven million, eight hundred seventeen thousand, four hundred twenty-three".