12217923 has 6 divisors (see below), whose sum is σ = 17648124. Its totient is φ = 8145276.

The previous prime is 12217913. The next prime is 12217939. The reversal of 12217923 is 32971221.

It is not a de Polignac number, because 12217923 - 2⁶ = 12217859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12217913) 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 5 ways as a sum of consecutive naturals, for example, 678765 + ... + 678782.

It is an arithmetic number, because the mean of its divisors is an integer number (2941354).

Almost surely, 2^12217923 is an apocalyptic number.

12217923 is a deficient number, since it is larger than the sum of its proper divisors (5430201).

12217923 is a wasteful number, since it uses less digits than its factorization.

12217923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357553 (or 1357550 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 12217923 is about 3495.4145676872. The cubic root of 12217923 is about 230.3204292465.

The spelling of 12217923 in words is "twelve million, two hundred seventeen thousand, nine hundred twenty-three".