11723439 has 16 divisors (see below), whose sum is σ = 19238912. Its totient is φ = 6183648.

The previous prime is 11723429. The next prime is 11723443. The reversal of 11723439 is 93432711.

It is not a de Polignac number, because 11723439 - 2⁹ = 11722927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11723419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21199 + ... + 21744.

It is an arithmetic number, because the mean of its divisors is an integer number (1202432).

Almost surely, 2^11723439 is an apocalyptic number.

11723439 is a deficient number, since it is larger than the sum of its proper divisors (7515473).

11723439 is a wasteful number, since it uses less digits than its factorization.

11723439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42966.

The product of its digits is 4536, while the sum is 30.

The square root of 11723439 is about 3423.9507881978. The cubic root of 11723439 is about 227.1703650988.

The spelling of 11723439 in words is "eleven million, seven hundred twenty-three thousand, four hundred thirty-nine".