11923905 has 24 divisors (see below), whose sum is σ = 22194432. Its totient is φ = 5450592.

The previous prime is 11923897. The next prime is 11923909. The reversal of 11923905 is 50932911.

It is not a de Polignac number, because 11923905 - 2³ = 11923897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11923909) 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 23 ways as a sum of consecutive naturals, for example, 7377 + ... + 8846.

It is an arithmetic number, because the mean of its divisors is an integer number (924768).

Almost surely, 2^11923905 is an apocalyptic number.

11923905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11923905 is a deficient number, since it is larger than the sum of its proper divisors (10270527).

11923905 is a wasteful number, since it uses less digits than its factorization.

11923905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16245 (or 16238 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 11923905 is about 3453.1007804581. The cubic root of 11923905 is about 228.4578940430.

The spelling of 11923905 in words is "eleven million, nine hundred twenty-three thousand, nine hundred five".