11723865 has 16 divisors (see below), whose sum is σ = 19113408. Its totient is φ = 6134336.

The previous prime is 11723843. The next prime is 11723867. The reversal of 11723865 is 56832711.

11723865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11723865 - 2⁷ = 11723737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11723867) 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, 6579 + ... + 8168.

It is an arithmetic number, because the mean of its divisors is an integer number (1194588).

Almost surely, 2^11723865 is an apocalyptic number.

11723865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11723865 is a deficient number, since it is larger than the sum of its proper divisors (7389543).

11723865 is a wasteful number, since it uses less digits than its factorization.

11723865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14808.

The product of its digits is 10080, while the sum is 33.

The square root of 11723865 is about 3424.0129964707. The cubic root of 11723865 is about 227.1731166635.

The spelling of 11723865 in words is "eleven million, seven hundred twenty-three thousand, eight hundred sixty-five".